Moved to the Soviet Far East, where he was promoted to major-general in 1944, Sorkin was the chief of the intelligence section of the staff of the Far Eastern Front in 1941-1945. He was assigned as intelligence section chief for the staff of the 1st Far Eastern Front at the time of the Far Eastern Front's temporary division into Army General Kirill Meretskov's 1st Far Eastern Front and Army General Maxim Purkayev's 2nd Far Eastern Front on the day of the Soviet entry into the Asian Theatre of World War II in August 1945.