High Quality Content by WIKIPEDIA articles! Aleksandar Stamboliyski (Bulgarian: Александър Стоименов Стамболийски, variously transliterated) (March 1, 1879 – June 14, 1923) was the prime minister of Bulgaria from 1919 until 1923. Stamboliyski was a member of the Agrarian Union, an agrarian peasant movement which was not allied to the monarchy, and edited their newspaper. He opposed the country`s participation in World War I and its support for the Central Powers, Amidst the war in 1914, Stamboliyski`s patriotism was questioned when members of the Bulgarian parliament questioned whether he was Bulgarian or not, to which he shouted in response "I am Yugoslav!". He was court-martialed and sentenced to life in prison in 1915.