Bogdan Dimitrov Filov was a Bulgarian archaeologist, art historian and politician. He was prime minister of Bulgaria during World War II. During his tenure, Bulgaria became the seventh nation to join the Axis Powers.
Bogdan Filov
The Tsardom of Bulgaria, also referred to as the Third Bulgarian Tsardom, sometimes translated in English as the "Kingdom of Bulgaria", or simply Bulgaria, was a constitutional monarchy in Southeastern Europe, which was established on 5 October 1908, when the Bulgarian state was raised from a principality to a tsardom.
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