The Russo-Turkish War (Turkish: 93 Harbi, lit. 'War of '93', named for the year 1293 in the Islamic calendar; Russian: Русско-турецкая война, romanized: Russko-turetskaya voyna, "Russian–Turkish war") was a conflict between the Ottoman Empire and a coalition led by the Russian Empire which included Bulgaria, Romania, Serbia, and Montenegro.^[14] Fought in the Balkans and in the Caucasus, it originated in emerging 19th-century Balkan nationalism. Additional factors included the Russian goals of recovering territorial losses endured during the Crimean War of 1853–1856, re-establishing itself in the Black Sea and supporting the political movement attempting to free Balkan nations from the Ottoman Empire.

The Russian-led coalition won the war, pushing the Ottomans back all the way to the gates of Constantinople, leading to the intervention of the Western European great powers. As a result, Russia succeeded in claiming provinces in the Caucasus, namely Kars and Batum, and also annexed the Budjak region. The principalities of Romania, Serbia, and Montenegro, each of which had had de facto sovereignty for some years, formally proclaimed independence from the Ottoman Empire. After almost five centuries of Ottoman domination (1396–1878), Bulgaria emerged as an autonomous state with support and military intervention from Russia.

Conflict pre-history

Treatment of Christians in the Ottoman Empire

Article 9 of the 1856 Paris Peace Treaty, concluded at the end of the Crimean War, obliged the Ottoman Empire to grant Christians equal rights with Muslims. Before the treaty was signed, the Ottoman government issued an edict, the Edict of Gülhane, which proclaimed the principle of the equality of Muslims and non-Muslims,^[15] and produced some specific reforms to this end. For example, the jizya tax was abolished and non-Muslims were allowed to join the army.^[16]

Crisis in Lebanon, 1860

In 1858, stirred by their clergy, the Maronite peasants of northern Lebanon revolted against their predominantly Druze feudal overlords and established a peasant republic. In southern Beirut vilayet, where both Maronite and Druze peasants worked under Druze overlords, Druze peasants sided with their co-religious and against the Maronites, transforming the conflict into a civil war. Although both sides suffered, about 10,000 Maronites were massacred at the hands of the Druze.^[17][18]

Fearing European intervention, the Ottoman foreign minister Mehmed Fuad Pasha was dispatched to Syria and immediately set about trying to resolve the conflict as swiftly as possible. Mehmed sought out and executed the agitators on all sides, including the governor and other officials. Order was soon restored, and preparations made to give Lebanon new autonomy. These efforts were ultimately not enough to prevent European intervention, however, with France deploying a fleet in September 1860. Fearing that a unilateral intervention would increase French influence in the region at their expense, the British joined the French expedition.^[19] Faced with further European pressure, the Sultan agreed to appoint a Christian governor in Lebanon, whose candidacy was to be submitted by the Sultan and approved by the European powers.^[17]

The revolt in Crete, 1866–1869

The Cretan Revolt, which began in 1866, resulted from the failure of the Ottoman Empire to apply reforms for improving the life of the population and the Cretans' desire for enosis – union with Greece.^[20] The insurgents gained control over the whole island, except for five fortified cities where the Muslims took refuge. The Greek press claimed^{[citation needed]} that Muslims had massacred Greeks and the word was spread throughout Europe. Thousands of Greek volunteers were mobilized and sent to the island.

The siege of Arkadi Monastery became particularly well known. In November 1866, about 250 Cretan Greek combatants and around 600 women and children were besieged by about 23,000 mainly Cretan Muslims aided by Ottoman troops, and this became widely known in Europe. After a bloody battle with a large number of casualties on both sides, the Cretan Greeks finally surrendered when their ammunition ran out but were killed upon surrender.^[21]

By early 1869, the insurrection was suppressed, but the Porte offered some concessions, introducing island self-rule and increasing Christian rights on the island. Although the Cretan crisis ended better for the Ottomans than almost any other diplomatic confrontation of the century, the insurrection, and especially the brutality with which it was suppressed, led to greater public attention in Europe to the oppression of Christians in the Ottoman Empire.

Small as the amount of attention is which can be given by the people of England to the affairs of Turkey ... enough was transpiring from time to time to produce a vague but a settled and general impression that the Sultans were not fulfilling the "solemn promises" they had made to Europe; that the vices of the Turkish government were ineradicable; and that whenever another crisis might arise affecting the "independence" of the Ottoman Empire, it would be wholly impossible to afford to it again the support we had afforded in the Crimean war.^[22]

Changing balance of power in Europe

Although on the winning side in the Crimean War, the Ottoman Empire continued to decline in power and prestige. The financial strain on the treasury forced the Ottoman government to take a series of foreign loans at such steep interest rates that, despite all the fiscal reforms that followed, pushed it into unpayable debts and economic difficulties. This was further aggravated by the need to accommodate more than 600,000 Muslim Circassians, expelled by the Russians from the Caucasus, to the Black Sea ports of north Anatolia and the Balkan ports of Constanța and Varna, which cost a great deal in money and in civil disorder to the Ottoman authorities.^[23]

The New European Concert

The Concert of Europe established in 1814 was shaken in 1859 when France and Austria fought over Italy. It came apart completely as a result of the wars of German Unification, when the Kingdom of Prussia, led by Chancellor Otto von Bismarck, defeated Austria in 1866 and France in 1870, replacing Austria as the dominant power in Central Europe. Britain, diverted by the Irish question and averse to warfare, chose not to intervene again to restore the European balance. Bismarck did not wish the breakup of the Ottoman Empire to create rivalries that might lead to war, so he took up Tsar Alexander II of Russia's earlier suggestion that arrangements be made in case the Ottoman Empire fell apart, creating the Three Emperors' League with Austria-Hungary and Russia to keep France isolated on the continent.

France responded by supporting self-determination movements, particularly if they concerned the three emperors and the Sultan. Thus revolts in Poland against Russia and national aspirations in the Balkans were encouraged by France. Russia worked to regain its right to maintain a fleet on the Black Sea and vied with the French in gaining influence in the Balkans by using the new Pan-Slavic idea that all Slavs should be united under Russian leadership. This could be done only by destroying the two empires where most non-Russian Slavs lived, the Habsburg and the Ottoman Empires. The ambitions and the rivalries of the Russians and French in the Balkans surfaced in Serbia, which was experiencing its own national revival and had ambitions that partly conflicted with those of the great powers.^[24]

Russia after the Crimean War

Russia ended the Crimean War with minimal territorial losses, but was forced to destroy its Black Sea Fleet and Sevastopol fortifications. Russian international prestige was damaged, and for many years revenge for the Crimean War became the main goal of Russian foreign policy. This was not easy though – the Paris peace treaty included guarantees of Ottoman territorial integrity by Great Britain, France and Austria; only Prussia remained friendly to Russia.

The newly appointed Russian chancellor, Alexander Gorchakov depended upon alliance with Prussia and its chancellor Bismarck. Russia consistently supported Prussia in her wars with Denmark (1864), Austria (1866) and France (1870). In March 1871, using the crushing French defeat and the support of a grateful Germany, Russia achieved international recognition of its earlier denouncement of Article 11 of the Paris Peace Treaty, thus enabling it to revive the Black Sea Fleet.

Other clauses of the Paris Peace Treaty, however, remained in force, specifically Article 8 with guarantees of Ottoman territorial integrity by Great Britain, France and Austria. Therefore, Russia was extremely cautious in its relations with the Ottoman Empire, coordinating all its actions with other European powers. A Russian war with Turkey would require at least the tacit support of all other Great Powers, and Russian diplomacy was waiting for a convenient moment.

Balkan crisis of 1875–1876

In 1875, a series of Balkan events brought Europe to the brink of war. The state of Ottoman administration in the Balkans continued to deteriorate throughout the 19th century, with the central government occasionally losing control over whole provinces. Reforms imposed by European powers did little to improve the conditions of the Christian population, while managing to dissatisfy a sizable portion of the Muslim population. Bosnia and Herzegovina suffered at least two waves of rebellion by the local Muslim population, the most recent ending in 1862.

Austria-Hungary consolidated after the turmoil of the first half of the century and sought to reinvigorate its centuries long policy of expansion at the expense of the Ottoman Empire. Meanwhile, the nominally autonomous, de facto independent principalities of Serbia and Montenegro also sought to expand into regions inhabited by their compatriots. Nationalist and irredentist sentiments were strong and were encouraged by Russia and her agents. At the same time, a severe drought in Anatolia in 1873 and flooding in 1874 caused famine and widespread discontent in the heart of the Empire. The agricultural shortages precluded the collection of necessary taxes, which forced the Ottoman government to declare bankruptcy in October 1875 and increase taxes on outlying provinces including the Balkans.

Balkan uprisings

Albanian revolts

István Deák states that the Albanian highlanders resented new taxes and conscription, and fought against the Ottomans in the war.^[25]

Herzegovina Uprising

An uprising against Ottoman rule began in Herzegovina in July 1875. By August almost all of Herzegovina had been seized and the revolt had spread into Bosnia. Supported by nationalist volunteers from Serbia and Montenegro, the uprising continued as the Ottomans committed more and more troops to suppress it. With its origin in the vicinity of the town of Nevesinje the uprising was also known as "Nevesinjska puška" - the rifle of Nevesinje.

Bulgarian Uprising

The revolt of Bosnia and Herzegovina spurred Bucharest-based Bulgarian revolutionaries into action. In 1875, a Bulgarian uprising was hastily prepared to take advantage of Ottoman preoccupation, but it fizzled before it started. In the spring of 1876, another uprising erupted in the south-central Bulgarian lands despite the fact that there were numerous regular Turkish troops in those areas.

A special Turkish military committee was established to quell the uprising. Regular troops (Nizam) and irregulars (Redif or Bashi-bazouk) were directed to fight the Bulgarians (11 May – 9 June 1876). The irregulars were mostly drawn from the Muslim inhabitants of the Bulgarian region. Many were Circassians from the Caucasus or Crimean Tatars who were expelled during the Crimean War; some were Islamized Bulgarians. The Ottoman army suppressed the revolt, massacring up to 30,000^[26][27] people in the process.^[28][29] Five thousand out of the seven thousand villagers of Batak were put to death.^[30] Both Batak and Perushtitsa, where the majority of the population was also massacred, participated in the rebellion.^[27] Many of the perpetrators of those massacres were later decorated by the Ottoman high command.^[27] Modern historians have estimated the number of murdered Bulgarians at between 30,000 and 100,000.^[31]

• 
  Konstantin Makovsky, The Bulgarian Martyresses, a painting depicting the atrocities of bashibazouks in Bulgaria.
• 
  Two Hawks by Vasily Vereshchagin, showing two Bashibazouks held captive by the Bulgarian and Russian army.
• 
  Bashi-bazouks, returning with the spoils from the Romanian shore of the Danube. 1877 engraving.
• 
  Bashi-bazouks' atrocities in Bulgaria.

International reaction to atrocities in Bulgaria

Word of the bashi-bazouks' atrocities filtered to the outside world by way of the American-run Robert College located in Constantinople. The majority of the students were Bulgarian, and many received news of the events from their families back home. Soon the Western diplomatic community in Constantinople was abuzz with rumours, which eventually found their way into newspapers in the West. While in Constantinople in 1879, Protestant missionary George Warren Wood reported Turkish authorities in Amasia brutally persecuting Christian Armenian refugees from Soukoum Kaleh. He was able to coordinate with British diplomat Edward Malet to bring the matter to the attention of the Sublime Porte, and then to the British Foreign Secretary Robert Gascoyne-Cecil (the Marquess of Salisbury).^[32] In Britain, where Disraeli's government was committed to supporting the Ottomans in the ongoing Balkan crisis, the Liberal opposition newspaper The Daily News hired American journalist Januarius A. MacGahan to report on the massacre stories first-hand.

MacGahan toured the stricken regions of the Bulgarian uprising, and his report, splashed across The Daily News's front pages, galvanized British public opinion against Disraeli's pro-Ottoman policy.^[33] In September, opposition leader William Ewart Gladstone published his Bulgarian Horrors and the Question of the East^[34] calling upon Britain to withdraw its support for Turkey and proposing that Europe demand independence for Bulgaria and Bosnia and Herzegovina.^[35] As the details became known across Europe, many dignitaries, including Charles Darwin, Oscar Wilde, Victor Hugo and Giuseppe Garibaldi, publicly condemned the Ottoman abuses in Bulgaria.^[36]

The strongest reaction came from Russia. Widespread sympathy for the Bulgarian cause led to a nationwide surge in patriotism on a scale comparable with the one during the Patriotic War of 1812. From autumn 1875, the movement to support the Bulgarian uprising involved all classes of Russian society. This was accompanied by sharp public discussions about Russian goals in this conflict: Slavophiles, including Fyodor Dostoevsky, saw in the impending war the chance to unite all Orthodox nations under Russia's helm, thus fulfilling what they believed was the historic mission of Russia, while their opponents, westernizers, inspired by Ivan Turgenev, denied the importance of religion and believed that Russian goals should not be defense of Orthodoxy but liberation of Bulgaria.^[37]

Serbo-Turkish War and diplomatic maneuvering

On 30 June 1876, Serbia, followed by Montenegro, declared war on the Ottoman Empire. In July and August, the ill-prepared and poorly equipped Serbian army helped by Russian volunteers failed to achieve offensive objectives but did manage to repulse the Ottoman offensive into Serbia. Meanwhile, Alexander II of Russia and Prince Gorchakov met Austria-Hungary's Franz Joseph I and Count Andrássy in the Reichstadt castle in Bohemia. No written agreement was made, but during the discussions, Russia agreed to support Austrian occupation of Bosnia and Herzegovina, and Austria-Hungary, in exchange, agreed to support the return of Southern Bessarabia – lost by Russia during the Crimean War – and Russian annexation of the port of Batum on the east coast of the Black Sea. Bulgaria was to become autonomous (independent, according to the Russian records).^[38]

As the fighting in Bosnia and Herzegovina continued, Serbia suffered a string of setbacks and asked the European powers to mediate an end to the war. A joint ultimatum by the European powers forced the Porte to give Serbia a one-month truce and start peace negotiations. Turkish peace conditions however were refused by European powers as too harsh. In early October, after the truce expired, the Turkish army resumed its offensive and the Serbian position quickly became desperate. On 31 October, Russia issued an ultimatum requiring the Ottoman Empire to stop the hostilities and sign a new truce with Serbia within 48 hours. This was supported by the partial mobilization of the Imperial Russian Army (up to 20 divisions). Sultan Abdul Hamid II accepted the conditions of the ultimatum.

To resolve the crisis, on 11 December 1876, the Constantinople Conference of the Great Powers was opened in Constantinople (to which Ottoman representatives were not invited). A compromise solution was negotiated, granting autonomy to Bulgaria, Bosnia and Herzegovina under the joint control of European powers. The Ottomans, however, refused to sacrifice their independence by allowing international representatives to oversee the institution of reforms and sought to discredit the conference by announcing on 23 December, the day the conference was closed, that a constitution was adopted that declared equal rights for religious minorities within the Empire. The Ottomans attempted to use this manoeuver to get their objections and amendments to the agreement heard. When they were rejected by the Great Powers, the Ottoman Empire announced its decision to disregard the results of the conference.

On 15 January 1877, Russia and Austria-Hungary signed a written agreement confirming the results of the earlier Reichstadt Agreement of July 1876. This assured Russia of the benevolent neutrality of Austria-Hungary in the impending war. These terms meant that in case of war Russia would do the fighting and Austria-Hungary would derive most of the advantage. Russia therefore made a final effort for a peaceful settlement. After reaching an agreement with its main Balkan rival and with anti-Ottoman sympathies running high throughout Europe due to the Bulgarian atrocities and the rejection of the Constantinople agreements, Russia finally felt free to declare war.

Status of combatants

The Ottoman Army

The Ottoman army at this time solely conscripted Muslims with non-Muslims paying a poll tax in lieu of service, the army itself was divided into four categories: the Nizam (standing army), who served for four years (five for cavalry and engineers); the Ithiat, or first reserve, where a further two years were served (one year for the cavalry and artillery); the Redif, which took veterans of the Nizam and Ithiat categories and men who did not serve; and the Moustafiz, where all men who had completed their service in the Redif (approximately 300,000 troops) served for a further six years.^[39]

The Redif itself was divided into four categories: the first category consisted of veterans of the Nizam category, who served in the first Redif subcategory for four years before entering the second Redif sub-category; men who were not conscripted served in the third sub-category of the Redif for four years before entering the fourth subcategory. The Redif itself was grouped into battalions and classes, with whole battalions taken out to serve as new units. The annual draft conscripted 37,500 men; following mobilisation of the Nizam and Ithiat, these two portions of the army totaled approximately 210,000 men. An additional 20,000 men of the Gendarme were included in the Nizam. The Redif was theoretically capable of providing 190,000–200,000 troops.^[40]

Sultan Abdulaziz had reorganised the military school during his reign to educate officers. However, the turnout of this academy was poor and only 1,600 of the 20,000 regular officers of the army were academy trained, though the artillery saw the highest concentration of academy trained officers at 20% of the total. For the entire Ottoman army, only 132 academy-trained generals were available.^[39]

The Ottoman army was organised at the battalion level with a battalion nominally holding 800 men subdivided into companies of 100 men, for formations above the battalion level these were to be assembled ad-hoc this results in difficulty at estimating Ottoman troop strength throughout the war as many units were below strength before entering the war due to the many rebellions affecting the empire. However, the Ottoman army was well prepared for war, as it had increasingly called up its reserves up to the third subcategory of the Redif when Russian forces began gathering in Bessarabia.^[41] Olender gives the Ottoman battalion (tabor) of infantry at 774 men on paper and 650 in practice, the cavalry squadron containing 143 men on paper and 100 in practice, with the artillery being organised into six gun batteries.^[40]

The Ottoman army was also well equipped; 75% of its troops were equipped with Peabody-Martini rifles (accurate to 1,800 yards), with 300,000 of these guns having been purchased prior to the war. The remainder of the regular troops used Snider rifles; the irregulars used Winchester repeating rifles, and the Egyptians used Remington rifles.^[42] The Ottoman support services were, however, less impressive, with the army often forced to resort to foraging. On the other hand, Ottoman forces were equipped with entrenching tools (which they used extensively at Plevna) and had sufficient ammunition for their repeating rifles. The Ottoman artillery were armed with Krupp guns of the 8cm and 9cm types for field usage, with 12 cm and 15cm guns also being used (but less commonly) and various older guns found primarily in fortresses.^[43][40]

At the outbreak of war, the Ottoman army was divided into several groups. The largest was the 168,000-man contingent under the command of Abdülkerim Nadir Pasha, based out of Shumla. 140,000 were assigned to the general task of fighting threats in the European provinces of the Empire, with 45,000 in various garrisons in Anatolia, Europe, and Crete. With the Caucasus army containing 70,000 men, the total of number of troops amounted to 378,000.^[44]

Olender gives a breakdown of Ottoman troops in the spring of 1877 as containing 571 infantry battalions (181 of which were Nizam), 147 cavalry squadrons and 143 artillery batteries not including the fortress and garrison companies or irregulars. On paper this would amount to 441,954 infantry (140,094 being nizam troops), 21,021 cavalry and 858 guns. However, due to other conflicts and the ongoing process of mobilisation of the Redif units at this process the Regular Ottoman army amounted to 400,000 troops with an additional 90,000 irregular troops and Egyptian troops.^[40]

Disposition of Ottoman forces at the outbreak of war^[45][40]

Location	Commander	Formations	Personnel (Paper Olender)
Vidin	Osman Pasha	50 battalions 10 squadrons 15 batteries	30,000 (40,130 men, 90 guns)
Rushchuk Sistova	Kaisserli AhmedPasha	15 battalions 4 squadrons 5 batteries	15,000 (12,182, 30 guns)
Silistra	Sulami Pasha	12 battalions 3 squadrons 3 batteries	9,000 (9,717, 18 guns)
ShumlaTargovishte	Ahmed Eyub Pasha	65 battalions 30 squadrons (mostly irregular) 15 batteries	55,000 (54,600, 90 guns)
Varna	Reshid Pasha	12 battalions 2 squadrons 2 batteries	8,000 (9,288, 12 guns)
Sofia, Tirnovo, Adrianople Constantinople		45 battalions 12 squadrons 8 batteries	25,000 (36,546, 48 guns)
Bosnia	Suleiman Pasha		15,000
Albania			20,000
Novi Pazar			10,000
Crete and European Ottoman lands			45,000

The Russian Army

The Russian army in the decade prior to the war underwent major modernisation spearheaded by the Minister of War Dmitry Milyutin, this programme of reform gave Russia a large army that was capable of fighting a war against the Ottomans. All Russian men were to serve 6 years in the active army and 9 years in the reserves though through exemption the effective intake of conscription was considerably less (in 1874 of 724,648 eligible men only 150,000 were enlisted this having risen to 218,000 by 1877) in peacetime, though this was still sufficient to meet the Russian need for manpower. The Active portion of the army was subdivided into 2 portions, the local troops, who were garrison soldiers in Europe, regular soldiers in Asia, stationary forces and gendarmes, the other portion was the Field Army. In addition to these forces there was the militia (opolcheniye), which contained all men exempted from conscripted and men under 40 who had completed their terms of service.^[46][47]

The Field Army was organised into 48 infantry divisions (3 of which were guard and 4 Grenadier). There were also 8 rifle brigades, 19 cavalry divisions, 35 horse gun batteries, 19 engineer battalions, 49 field gun brigades. The Russian divisions were organised into corps of 2 to 3 divisions, a corps excluding support and command staff would consist of 20,160 infantry, 2,048 cavalry, 96 field guns and 12 horse drawn guns (this is for a 2 division corps).^[46]

The Russian army in 1874 contained 754,265 men and by January 1, 1878, this had risen to over 1.5 million men. The Russian army used 2 rifles, the Krnka rifle, which they possessed 800,000 of at the minimum and was accurate to only 600 yards (to the Turkish Peabody's 1,800), and the Berdan rifle, which equipped the Line, Grenadier, Rifle and Guard formations and was accurate to 1,500 yards. However, the Russian army, despite possessing breechloading rifles, was still holding to the maxims of Suvorov, which called for the usage of the bayonet as the principal weapon, Russian soldiers also lacked entrenching equipment to an adequate level. Russian artillery, despite being breechloaded, were nearing obsolescence^[48]

Course of the war

Opening manoeuvres

On 12 April 1877, Romania gave permission to the Russian troops to pass through its territory to attack the Turks.

On 24 April 1877 Russia declared war on the Ottomans, and its troops entered Romania through the newly built Eiffel Bridge near Ungheni, on the Prut river, resulting in Turkish bombardments of Romanian towns on the Danube.

On 10 May 1877, the Principality of Romania, which was under nominal Turkish suzerainty, declared its independence.^[49]

At the beginning of the war, the outcome was far from obvious. The Russians could send a larger army into the Balkans: about 300,000 troops were within reach. The Ottomans had about 200,000 troops on the Balkan peninsula, of which about 100,000 were assigned to fortified garrisons, leaving about 100,000 for the army of operation. The Ottomans had the advantage of being fortified, complete command of the Black Sea, and patrol boats along the Danube river.^[50] They also possessed superior arms, including new British and American-made rifles and German-made artillery.

In the event, however, the Ottomans usually resorted to passive defense, leaving the strategic initiative to the Russians, who, after making some mistakes, found a winning strategy for the war. The Ottoman military command in Constantinople made poor assumptions about Russian intentions. They decided that Russians would be too lazy to march along the Danube and cross it away from the delta, and would prefer the short way along the Black Sea coast. This would be ignoring the fact that the coast had the strongest, best supplied and garrisoned Turkish fortresses. There was only one well manned fortress along the inner part of the River Danube, Vidin. It was garrisoned only because the troops, led by Osman Nuri Pasha, had just taken part in defeating the Serbs in their recent war against the Ottoman Empire.

The Russian campaign was better planned, but it relied heavily on Turkish passivity. A crucial Russian mistake was sending too few troops initially; an expeditionary force of about 185,000 crossed the Danube in June, slightly fewer than the combined Turkish forces in the Balkans (about 200,000). After setbacks in July (at Pleven and Stara Zagora), the Russian military command realized it did not have the reserves to keep the offensive going and switched to a defensive posture. The Russians did not even have enough forces to blockade Pleven properly until late August, which effectively delayed the whole campaign for about two months.

Balkan theatre

At the start of the war, Russia and Romania destroyed all vessels along the Danube and mined the river, thus ensuring that Russian forces could cross the Danube at any point without resistance from the Ottoman Navy. The Ottoman command did not appreciate the significance of the Russians' actions. In June, a small Russian unit crossed the Danube close to the delta, at Galați, and marched towards Ruschuk (today Ruse). This made the Ottomans even more confident that the big Russian force would come right through the middle of the Ottoman stronghold.

In the first month of the war, the Ottomans suffered a pair of significant naval losses on the Danube. The turret ship Lütf-ü Celil was destroyed by a Russian artillery battery on 11 May.^[51] And on the night of 25–26 May, a Romanian torpedo boat with a mixed Romanian-Russian crew attacked and sank the Ottoman monitor Seyfî on the Danube. Under the direct command of Major-General Mikhail Ivanovich Dragomirov, on the night of 27/28 June 1877 (NS) the Russians constructed a pontoon bridge across the Danube at Svishtov. After a short battle in which the Russians suffered 812 killed and wounded,^[52] the Russians secured the opposing bank and drove off the Ottoman infantry brigade defending Svishtov. At this point the Russian force was divided into three parts: the Eastern Detachment under the command of Tsarevich Alexander Alexandrovich, the future Tsar Alexander III of Russia, assigned to capture the fortress of Ruschuk and cover the army's eastern flank; the Western Detachment, to capture the fortress of Nikopol, Bulgaria and cover the army's western flank; and the Advance Detachment under Count Joseph Vladimirovich Gourko, which was assigned to quickly move via Veliko Tarnovo and penetrate the Balkan Mountains, the most significant barrier between the Danube and Constantinople.

Responding to the Russian crossing of the Danube, the Ottoman high command in Constantinople ordered Osman Nuri Pasha to advance east from Vidin and occupy the fortress of Nikopol, just west of the Russian crossing. On his way to Nikopol, Osman Pasha learned that the Russians had already captured the fortress and so moved to the crossroads town of Plevna (now known as Pleven), which he occupied with a force of approximately 15,000 on 19 July (NS).^[53] The Russians, approximately 9,000 under the command of General Schilder-Schuldner, reached Plevna early in the morning. Thus began the Siege of Plevna, lasting for 145 days until 10 December.

Osman Pasha organized a defense and repelled two Russian attacks with colossal casualties on the Russian side. At that point, the sides were almost equal in numbers and the Russian army was very discouraged.^[54] A counter-attack might have allowed the Ottomans to control and destroy the Russians' bridge, but Osman Pasha did not leave the fortress because he had orders to stay fortified in Plevna.

Russia had no more troops to throw against Plevna, so the Russians besieged it, and subsequently asked^[55] the Romanians to cross the Danube and help them. On 9 August, Suleiman Pasha made an attempt to help Osman Pasha with 30,000 troops, but he was stopped by Bulgarians at the Battle of Shipka Pass. After three days of fighting, the volunteers were relieved by a Russian force led by General Fyodor Radetsky, and the Turkish forces withdrew. Soon afterwards, Romanian forces crossed the Danube and joined the siege. On 16 August, at Gorni-Studen, the armies around Plevna were placed under the command of the Romanian Prince Carol I, aided by the Russian general Pavel Dmitrievich Zotov and the Romanian general Alexandru Cernat.

The Turks maintained several fortresses around Pleven which the Russian and Romanian forces gradually reduced.^[56][57] The Romanian 4th Division led by General Gheorghe Manu took the Grivitsa redoubt after four bloody assaults and managed to keep it until the very end of the siege. The Siege of Plevna (July–December 1877) turned to victory only after Russian and Romanian forces cut off all supply routes to the fortified Ottomans. With supplies running low, Osman Pasha made an attempt to break the Russian siege in the direction of Opanets. On 9 December, in the middle of the night the Ottomans threw bridges over the Vit river and crossed it, attacked on a 2-mile (3.2 km) front and broke through the first line of Russian trenches. Here they fought hand to hand and bayonet to bayonet, with little advantage to either side. Outnumbering the Ottomans almost 5 to 1, the Russians drove the Ottomans back across the Vit. Osman Pasha was wounded in the leg by a stray bullet, which killed his horse beneath him. Making a brief stand, the Ottomans eventually found themselves driven back into the city, losing 5,000 men to the Russians' 2,000. The next day, Osman surrendered the city, the garrison, and his sword to the Romanian colonel, Mihail Cerchez. He was treated honorably, but his troops perished in the snow by the thousands as they straggled off into captivity.

At this point, Serbia, having finally secured monetary aid from Russia, declared war on the Ottoman Empire again. This time there were far fewer Russian officers in the Serbian army but this was more than offset by the experience gained from the 1876–77 war. Under nominal command of Prince Milan Obrenović (effective command was in hands of general Kosta Protić, the army chief of staff), the Serbian Army went on offensive in what is now eastern south Serbia. A planned offensive into the Ottoman Sanjak of Novi Pazar was called off due to strong diplomatic pressure from Austria-Hungary, which wanted to prevent Serbia and Montenegro from coming into contact, and which had designs to spread Austria-Hungary's influence through the area. The Ottomans, outnumbered unlike two years before, mostly confined themselves to passive defence of fortified positions. By the end of hostilities the Serbs had captured Ak-Palanka (today Bela Palanka), Pirot, Niš and Vranje.

Russians under Field Marshal Gourko succeeded in capturing the passes at the Stara Planina mountain, which were crucial for maneuvering. Next, both sides fought a series of battles for Shipka Pass. Gourko made several attacks on the Pass and eventually secured it. Ottoman troops spent much effort to recapture this important route, to use it to reinforce Osman Pasha in Pleven, but failed. Eventually Gourko led a final offensive that crushed the Ottomans around Shipka Pass. The Ottoman offensive against Shipka Pass is considered one of the major mistakes of the war, as other passes were virtually unguarded. At this time a huge number of Ottoman troops stayed fortified along the Black Sea coast and engaged in very few operations.

A Russian army crossed the Stara Planina by a high snowy pass in winter, guided and helped by local Bulgarians, not expected by the Ottoman army, and defeated the Turks at the Battle of Tashkessen and took Sofia. The way was now open for a quick advance through Plovdiv and Adrianople to Constantinople.

Besides the Romanian Army (which mobilized 130,000 men, losing 10,000 of them to this war), more than 12,000 volunteer Bulgarian troops (Opalchenie) from the local Bulgarian population as well as many hajduk detachments fought in the war on the side of the Russians.

Caucasian theatre

The Russian 1st Caucasus Army Corps was stationed in Georgia and Armenia, composed of approximately 50,000 men and 202 guns under the overall command of Grand Duke Michael Nikolaevich, Governor General of the Caucasus.^[58] The Russian force stood opposed by an Ottoman Army of 100,000 men led by General Ahmed Muhtar Pasha. While the Russian army was better prepared for the fighting in the region, it lagged behind technologically in certain areas such as heavy artillery and was outgunned, for example, by the superior long-range Krupp artillery that Germany had supplied to the Ottomans.^[59]

The Caucasus Corps was led by a quartet of Armenian commanders: Generals Mikhail Loris-Melikov, Arshak Ter-Gukasov (Ter-Ghukasov/Ter-Ghukasyan), Ivan Lazarev and Beybut Shelkovnikov.^[60] Forces under Lieutenant-General Ter-Gukasov, stationed near Yerevan, commenced the first assault into Ottoman territory by capturing the town of Bayazid on 27 April 1877.^[61] Capitalizing on Ter-Gukasov's victory there, Russian forces advanced, taking the region of Ardahan on 17 May; Russian units also besieged the city of Kars in the final week of May, although Ottoman reinforcements lifted the siege and drove them back. Bolstered by reinforcements, in November 1877 General Lazarev launched a new attack on Kars, suppressing the southern forts leading to the city and capturing Kars itself on 18 November.^[62] On 19 February 1878, the strategic fortress town of Erzurum was taken by the Russians after a lengthy siege. Although they relinquished control of Erzurum to the Ottomans at the end the war, the Russians acquired the regions of Batum, Ardahan, Kars, Olti, and Sarikamish and reconstituted them into the Kars Oblast.^[63]

Greek involvement

During the course of the war, the majority of Greeks wanted to enter the war on Russia's side, however the Greek government decided reluctantly to not intervene, due to British neutrality.^[64] The British guaranteed that after the end of the war they would intervene themselves and assure equal rights for the Greek subjects of the Ottoman Empire, as long as Greece didn't join the war.^[64] Nevertheless, several Greek revolts broke out in Crete, Epirus, Macedonia and Thessaly demanding union with Greece. The Greek Army invaded Thessaly in January 1878, but didn't officially declare war on the Ottomans; along with Greek irregular revolutionaries, the Greek Army won the Battle of Mouzaki.^[65] However, the Great Powers asked for the Greece to recall its army, in return, they ensured that issues regarding the Greek communities would be raised in the post-war Peace Conference. The Greek government accepted and, as a result, the rebellions were left unsupported and were crushed by the Ottomans.^[66] Three years later, with the Convention of Constantinople, most of Thessaly (excluding Elassona) as well as Arta were ceded to Greece.^[67]

Zdroj:https://en.wikipedia.org?pojem=Russo-Turkish_War,_1877-1878
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