Second Balkan War in the context of "Alexandroupoli"

The Balkan Wars were two conflicts that took place in the Balkan states in 1912 and 1913. In the First Balkan War, the four Balkan states of Greece, Serbia, Montenegro and Bulgaria declared war upon the Ottoman Empire and defeated it, in the process stripping the Ottomans of their European provinces, leaving only Eastern Thrace under Ottoman control. In the Second Balkan War, Bulgaria fought against the other four combatants of the first war. It also faced an attack from Romania from the north. The Ottoman Empire lost the bulk of its territory in Europe. Although not involved as a combatant, Austria-Hungary became relatively weaker as a much enlarged Serbia pushed for union of the South Slavic peoples. The war set the stage for the July crisis of 1914 and as a prelude to the First World War.

By the early 20th century, Bulgaria, Greece, Montenegro and Serbia had achieved independence from the Ottoman Empire, but large elements of their ethnic populations remained under Ottoman rule. Over the course of the Macedonian Struggle these states fought for influence between themselves and the Ottoman government within Ottoman Macedonia, during which their governments came under the control of nationalists. In 1912, these countries united to formed the Balkan League. The First Balkan War began on 8 October 1912, when the League member states attacked the Ottoman Empire, and ended eight months later with the signing on 30 May 1913 of the Treaty of London negotiated together with the Great Powers. The Great Powers - particularly Italy and Austria-Hungary -- included independence for Albania in the Treaty. The Second Balkan War began on 16 June 1913, when Bulgaria, dissatisfied with its allotment of territory from Macedonia, attacked its former Balkan League allies. The combined forces of the Serbian and Greek armies, with their superior numbers repelled the Bulgarian offensive and counter-attacked by invading Bulgaria from the west and the south. Romania, having taken no part in the first conflict, had intact armies to strike with and invaded Bulgaria from the north in violation of a peace treaty between the two states. The Ottoman Empire also attacked Bulgaria and advanced in Thrace, regaining Adrianople. In the resulting Treaty of Bucharest, Bulgaria managed to retain most of the territories it had gained in the First Balkan War. However, it was forced to cede the ex-Ottoman south part of Dobruja province to Romania.

The Kingdom of Serbia was a country located in the Balkans which was created when the ruler of the Principality of Serbia, Milan I, was proclaimed king in 1882. Since 1817, the Principality was ruled by the Obrenović dynasty (replaced by the Karađorđević dynasty for a short time). The Principality of Serbia, under the suzerainty of the Turkish Empire, de facto achieved full independence when the very last Ottoman troops left Belgrade in 1867. The Congress of Berlin in 1878 recognized the formal independence of the Principality of Serbia, and in its composition Nišava, Pirot, Toplica and Vranje districts entered the South part of Serbia.

In 1882, Serbia was elevated to the status of a kingdom, initially maintaining a foreign policy friendly to Austria-Hungary before turning to the Russian Empire and France following a coup d'état in 1903. Between 1912 and 1913, Serbia greatly enlarged its territory through engagement in the First and Second Balkan Wars – Sandžak-Raška, Kosovo Vilayet and Vardar Macedonia were annexed. At the end of World War I in 1918 it united with Vojvodina and the Kingdom of Montenegro, and in December 1918 it merged with the newly created State of Slovenes, Croats and Serbs to form the Kingdom of Serbs, Croats and Slovenes (later known as Kingdom of Yugoslavia) under the continued rule of the Karađorđević dynasty.

The First Balkan War lasted from October 1912 to May 1913 and involved actions of the Balkan League (the Kingdoms of Bulgaria, Serbia, Greece and Montenegro) against the Ottoman Empire. The Balkan states' combined armies overcame the initially numerically inferior (significantly superior by the end of the conflict) and strategically disadvantaged Ottoman armies, achieving rapid success.

The war was a comprehensive and unmitigated disaster for the Ottomans, who lost 83% of their European territories and 69% of their European population. As a result of the war, the League captured and partitioned almost all of the Ottoman Empire's remaining territories in Europe. Ensuing events also led to the creation of an independent Albania, which dissatisfied the Serbs. Bulgaria, meanwhile, was dissatisfied over the division of the spoils in Macedonia and attacked its former allies, Serbia and Greece, on 16 June 1913, which provoked the start of the Second Balkan War.

The Treaty of Bucharest (Romanian: Tratatul de la București; Serbian: Букурештански мир; Bulgarian: Букурещки договор; Greek: Συνθήκη του Βουκουρεστίου) was concluded on 10 August 1913, by the delegates of Bulgaria, Romania, Serbia, Montenegro and Greece. The Treaty was concluded in the aftermath of the Second Balkan War and amended the previous Treaty of London, which ended the First Balkan War. About one month later, the Bulgarians signed a separate border treaty (the Treaty of Constantinople) with the Ottomans, who had regained some territory west of the Enos-Midia Line during the second war.

Thracians or Thracian Bulgarians (Bulgarian: Тракийски българи or Тракийци) are a regional, ethnographic group of ethnic Bulgarians, inhabiting or native to Thrace. Today, the larger part of this population is concentrated in Northern Thrace, but much is spread across the whole of Bulgaria and the diaspora.

Until the beginning of the twentieth century the Thracian Bulgarians were scattered in the whole of Thrace, then part of the Ottoman Empire. After the persecutions during the Preobrazhenie Uprising and the ethnic cleansing, caused to the Bulgarian population in Eastern Thrace after the Second Balkan War, these people were expelled from the area. After World War I, Bulgaria was required to cede Western Thrace to Greece. A whole population of Bulgarians in Western Thrace was expelled into Bulgaria-controlled Northern Thrace. This was followed by a further population exchange between Bulgaria and Greece (under the Treaty of Neuilly-sur-Seine), which radically changed the demographics of the region toward increased ethnic homogenization within the territories each respective country ultimately was awarded. At this period the Bulgarian Communist Party was compelled by Comintern to accept the formation of a new Thracian nation on the base of this people in order to include them in a new separate Thracian state, as a part of a future Balkan Communist Federation.

The Kingdom of Bulgaria participated in World War I on the side of the Central Powers from 14 October 1915, when the country declared war on Serbia, until 30 September 1918, when the Armistice of Salonica came into effect.

After the Balkan Wars of 1912 and 1913, Bulgaria was diplomatically isolated, surrounded by hostile neighbors while lacking the support of any great power. Negative sentiment grew particularly in France and Russia, whose officials blamed Bulgaria for the dissolution of the Balkan League, an alliance of Balkan states directed against the Ottoman Empire. Bulgaria's defeat in the Second Balkan War in 1913 turned revanchism into a foreign policy focus.

The Treaty of Constantinople (Treaty of İstanbul) was a treaty between the Ottoman Empire and the Kingdom of Bulgaria signed on 29 September 1913 after the Second Balkan War at the Ottoman capital Constantinople, modern İstanbul.

After the Russo-Turkish War of 1877–1878, the 1878 Treaty of Berlin set up an autonomous state, the Principality of Bulgaria, within the Ottoman Empire. Although remaining under Ottoman sovereignty, it functioned independently, taking Alexander of Battenberg as its first prince in 1879. In 1885 Alexander took control of the still-Ottoman Eastern Rumelia, officially under a personal union. Following Prince Alexander's abdication (1886), a Bulgarian Assembly elected Ferdinand I as prince in 1887. Full independence from Ottoman control was declared in 1908.

In the 1912–1913 Balkan Wars, Bulgaria initially formed an alliance with Greece, Serbia and Montenegro against the Ottoman Empire, and together they conquered a great deal of Ottoman territory. Bulgaria, however, unhappy with the resulting division of territory, soon went to war against its former allies Serbia and Greece and lost territory it had gained in the first war. The First World War (1914–1918) saw Bulgaria fighting (1915–1918) alongside Germany, Austria-Hungary, and the Ottoman Empire. Defeat led to the Treaty of Neuilly-sur-Seine (27 November 1919), in accordance with which Bulgaria lost further territory. Social problems and political instability persisted throughout the Interwar period. In the Second World War (1939–1945), Bulgaria again allied with Germany (March 1941). Although Sofia attempted to pull out of the war as the Soviet Union advanced towards its territory (1944), the Red Army invaded (September 1944), and a communist government came to power (1944–1946) and established the People's Republic of Bulgaria (1946–1990).