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 Salo
A German postcard commemorating the entry of Bulgaria into the war.
Territorial changes following the two Balkan Wars.
A Punch cartoon of the Second Balkan War.
Vasil Radoslavov (c.1915). Prime minister from 1913 to 1918.
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
Ferdinand I of Bulgaria at the proclamation of Bulgarian independence, 1908
Areas where Bulgarians were the majority of the population (in light green) according to Anastas Ishirkov (1912).
Bulgarian officers on the Macedonian front