Complete the following sentence: NKVD arrested Meretskov at the start of the invasion of the Soviet Union. Released two months later, he returned to command the 7th Army and later the Volkhov Front during the 1941<unk>1944 siege of Leningrad. He commanded the Karelian Front from February 1944, notably the Petsamo<unk>Kirkenes Offensive of October 1944. <unk> <unk> <unk> <unk>
Soviet invasion of Japanese Manchuria.<unk> Soviet invasion of Japanese Manchuria. During the war he reached the rank of Marshal of the Soviet Union.