Answer
Aleksandar Tsankov, the leader of the right-wing People's Union, headed the Bulgarian government that Georgi Dimitrov attempted to overthrow in the abortive September Uprising of 1923. Tsankov, known for his repressive policies and anti-communist stance, was appointed Prime Minister in June 1923 and implemented measures that intensified political tensions and contributed to the Communist Party's decision to launch an armed insurrection.