After the defeat of the revolutionaries in the Baltics, Anvelt went underground, remaining active as a revolutionary, emerging as one of the leaders of the 1924 Estonian coup d'état attempt. In 1925, Anvelt arrived in the USSR, in 1926–29 working as a political commissar of the Zhukovsky Air Force Engineering Academy. From 1929 to 1935 he worked in top positions of the civilian air fleet's main administration. During the period from 1935 to 1937 Anvelt served as a member and an executive secretary of a department within the Comintern.