Boris III of Bulgaria
Boris III (Bulgarian: Борѝс III; Boris Treti; 30 January [O.S. 18 January] 1894 – 28 August 1943) was the Tsar of the Kingdom of Bulgaria from 1918 until his death in 1943. The eldest son of Ferdinand I, Boris assumed the throne upon the abdication of his father in the wake of Bulgaria's defeat in World War I. Under the 1919 Treaty of Neuilly, Bulgaria was forced to cede various territories, pay crippling war reparations, and greatly reduce the size of its military.