Principality of Bulgaria
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The Principality of Bulgaria was a vassal state under the suzerainty of the Ottoman Empire. It was established by the Treaty of Berlin in 1878.
Stefan Stambolov
An IMARO banner
Administrative subdivisions of Eastern Rumelia in 1907
Bulgarian unification of 1885
Kingdom of Bulgaria
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The Tsardom of Bulgaria, also known as the Third Bulgarian Tsardom, commonly known in English as the Kingdom of Bulgaria, or simply Bulgaria, was a constitutional monarchy in Southeastern Europe, whic
Principality of Bulgaria
…which the Ottoman Empire accepted with the Tophane Agreement. On 5 October [O.S. 22 September] 1908, Bulgaria formally declared its independence as the Kingdom of Bulgaria. In 1396 the Bulgarian–Ottoman Wars ended with the fall of the Bulgarian Empire, due to the Ottoman invasion of the Balkans and its own internal…
Ferdinand I of Bulgaria at the proclamation of Bulgarian independence, 1908
Boundaries on the Balkans after the First and the Second Balkan War (1912–1913)
Areas where Bulgarians were the majority of the population (in light green) according to Anastas Ishirkov (1912).
Bulgarian officers on the Macedonian front