 Complete the following phrase:  After the Bolshevik revolution, Glebov-Avilov was appointed the first Peoples Commissar for Posts and Telegraphs of the RSFSR. He was replaced on 19 December 1917, when the Bolsheviks formed a short-lived coalition with the Left Socialist revolutionaries. During the civil war, he commanded a flotilla on the Black Sea coast at Chornomorsk. He was assigned the task of scuttling the Black Sea fleet to prevent it falling into the hands of the German army. He then worked in the trade union, and was Ukraine Peoples Commissar for Labour. In 1924-1925, he was chairman of the Leningrad trade unions, and was sent as the soviet representative to the TUC annual congress in London, on the eve of the General Strike. He supported the Leningrad party leader Grigory Zinoviev against Josif Stalin. At the 