The 1924 Estonian coup d'état attempt was a failed coup attempt in Estonia on 1 December 1924, conducted by the Comintern, and staged by the Communist Party of Estonia and Bolsheviks who in most part had been infiltrated from the Soviet Union. Of the 279 actively participating pro-communist rebels, 125 were killed in action, later more than 500 people were arrested. Estonian government forces lost 26 men.