The Balkan Wars were a series of 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 the Ottoman Empire's control. In the Second Balkan War, Bulgaria fought against the other four original 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 thus served as a prelude to the First World War.
The First Balkan War lasted from October 1912 to May 1913 and involved actions of the Balkan League against the Ottoman Empire. The Balkan states' combined armies overcame the initially numerically inferior and strategically disadvantaged Ottoman armies, achieving rapid success.
The Second Balkan War was a conflict that broke out when Bulgaria, dissatisfied with its share of the spoils of the First Balkan War, attacked its former allies, Serbia and Greece, on 16 (O.S.) / 29 (N.S.) June 1913. Serbian and Greek armies repulsed the Bulgarian offensive and counterattacked, entering Bulgaria. With Bulgaria's also having previously engaged in territorial disputes with Romania and the bulk of Bulgarian forces engaged in the south, the prospect of an easy victory incited Romanian intervention against Bulgaria. The Ottoman Empire also took advantage of the situation to regain some lost territories from the previous war. When Romanian troops approached the capital Sofia, Bulgaria asked for an armistice, resulting in the Treaty of Bucharest, in which Bulgaria had to cede portions of its First Balkan War gains to Serbia, Greece and Romania. In the Treaty of Constantinople, it lost Adrianople to the Ottomans.
The Rhodopes are a mountain range in Southeastern Europe, and the largest by area in Bulgaria, with over 83% of its area in the southern part of the country and the remainder in Greece. Golyam Perelik is its highest peak at 2,191 meters (7,188 ft). The mountain range gives its name to the terrestrial ecoregion Rodope montane mixed forests that belongs in the temperate broadleaf and mixed forests biome and the Palearctic realm. The region is particularly notable for its karst areas with their deep river gorges, large caves and specific sculptured forms, such as the Trigrad Gorge.
Western Thrace or West Thrace, also known as Greek Thrace, is a geographic and historical region of Greece, between the Nestos and Evros rivers in the northeast of the country; East Thrace, which lies east of the river Evros, forms the European part of Turkey, and the area to the north, in Bulgaria, is known as Northern Thrace.
Svilengrad is a town in Haskovo Province, south-central Bulgaria, situated at the tripoint of Bulgaria, Turkey and Greece. It is the administrative centre of the homonymous Svilengrad Municipality.
The siege of Adrianople, was fought during the First Balkan War. The siege began on 3 November 1912 and ended on 26 March 1913 with the capture of Edirne (Adrianople) by the Bulgarian 2nd Army and the Serbian 2nd Army.
The Battle of Sarantaporo, also variously transliterated as Sarantaporon or Sarandaporon, took place on 9–10 October, 1912. It was the first major battle fought between Greek forces under Crown Prince Constantine and Ottoman forces under General Hasan Tahsin Pasha during the First Balkan War. The battle began when the Greek army attacked the Ottoman defensive line at the Sarantaporo pass, which connected Thessaly with central Macedonia.
The Battle of Yenidje, also transliterated as Yenice, was a major battle between Greek forces under Crown Prince Constantine and Ottoman forces under General Hasan Tahsin Pasha and took place between October 19–20 (O.S.), 1912 during the First Balkan War. The battle began when the Greek army attacked the Ottoman fortified position at Yenidje, which was the last line of defense for the city of Thessaloniki.
Keşan is a town in Edirne Province, Turkey. It is the seat of Keşan District. Its population is 64,842 (2022). In the summer its population increases because of an influx of tourists. The mayor is Mustafa Helvacıoğlu (AKP).
Goumenissa is a small traditional town in the Kilkis regional unit, Central Macedonia, Greece. It was the capital of the former Paionia Province. Since the 2011 local government reform it is part of the municipality Paionia, of which it is a community and a municipal unit. The municipal unit has an area of 208.949 km2. The 2011 census recorded 3,609 residents in the community and 6,130 residents in the municipal unit. The town sits on the southeastern part of the Paiko mountain range. Located 69 km northwest of Thessaloniki, 539 km north of Athens and 20 km north of Pella, the ancient capital of the kingdom of Macedon. Goumenissa is the seat of the Greek Orthodox diocese of Goumenissa, Axioupoli and Polykastro.
The Macedonian-Adrianopolitan Volunteer Corps was a volunteer corps of the Bulgarian Army during the Balkan Wars. It was formed on 23 September 1912 and consisted of Bulgarian volunteers from Macedonia and Thrace, regions still under Ottoman rule, and thus not subject to Bulgarian military service.
The Bulgarian–Ottoman wars were fought between the kingdoms remaining from the disintegrating Second Bulgarian Empire, and the Ottoman Empire, in the second half of the 14th century. The wars resulted with the collapse and subordination of the Bulgarian Empire, and effectively came to an end with the Ottoman conquest of Tarnovo in July 1393, although other Bulgarian states held out slightly longer, such as the Tsardom of Vidin until 1396 and the Despotate of Dobruja until 1411. As a result of the wars the Ottoman Empire greatly expanded its territory on the Balkan peninsula, stretching from the Danube to the Aegean Sea.
Nikola Koev Nikolov, known as Mamin Kolyu was a Bulgarian revolutionary of the Internal Macedonian-Adrianopolitan Revolutionary Organization (IMARO) who fought for the liberation of Macedonia and Thrace from Ottoman rule.
Vasil Hristov Chekalarov or Vasil Tcakalarov was a Bulgarian revolutionary and one of the leaders of Internal Macedonian Revolutionary Organisation in Macedonia. H. N. Brailsford described Chekalarov as the "cruel but competent general" of the Southern insurgents in Macedonia. He considered the adherents of Macedonist ideas to be Grecomans.
The Battle of Kircaali or Battle of Kardzhali was part of the First Balkan War between the armies of Bulgaria and the Ottoman Empire. It took place on 21 October 1912, when the Bulgarian Haskovo Detachment defeated the Ottoman Kırcaali Detachment of Yaver Pasha and permanently joined Kardzhali and the Eastern Rhodopes to Bulgaria. The anniversary of that event is celebrated annually on 21 October as a holiday of the city.
The I Corps of the Ottoman Empire was one of the corps of the Ottoman Army consisting of ethnic Albanians. It was formed in the early 20th century during Ottoman military reforms
Vasil Petrov Delov was a 20th-century Bulgarian officer and major general.
Nikola Genev Kolchev was a Bulgarian volunteer, officer, a lieutenant general, and a commander of the Macedonian-Adrianopolitan Volunteer Corps during the First Balkan War and the Second Balkan War.
Alexander Andreev Tanev was a 20th-century Bulgarian officer, lieutenant general of the cavalry, inspector of the cavalry from 1913 to 1915, commander of the cavalry division from October to November 1915 and was commander of the 1st divisional district until 1916.
Bulgaria 
Ottoman Empire