 Complete the following phrase:  From then he joined the Baltic Fleet, serving on the Rossia, Verniy and Rezviy, and temporarily commanding the destroyer Ryanny. Rall then took the wartime special course in minesweeping in 1917. He commanded the destroyer Podvizhniy between 1917 and 1918, and in 1918 took command of the transport vessel Riga. As an officer he was noted for always defending the honor and dignity of the subordinate sailors. He supported the Bolsheviks during the Russian Civil War, and as commander of the Podvizhniy was elected one of the first chairmen of the ship committees in Revel. He went on to command the destroyer between 1918 and 1919. In 1919 Rall was appointed flag navigator in command of minesweeping and barrages, and chief of the Baltic Sea mine defences. He took part in operations against the White Finns on Lake Ladoga and 