A Soviet-backed communist 1924 Estonian coup d'état attempt fails in Estonia.

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. The Estonian government forces lost 26 men.

Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Russia. The territory of Estonia consists of the mainland, the larger islands of Saaremaa and Hiiumaa, and over 2,300 other islands and islets on the east coast of the Baltic Sea. Its capital Tallinn and Tartu are the two largest urban areas. The Estonian language is the official language and the first language of the majority of its population of nearly 1.4 million. Estonia is one of the least populous members of the European Union and NATO.

December 1 is the 335th day of the year in the Gregorian calendar; 30 days remain until the end of the year.