• Immediately prior to the conclusion of World War II, he led a rescue mission which parachuted into a Japanese prisoner of war camp on Hainan Island, off the coast of China, to liberate some 400 allied prisoners of war.

• In early 1946, General Singlaub was assigned to Mukden, Manchuria, where he served as the Chief of a United States Military Liaison Mission until forced out by the Chinese Communists at the end of 1948. From December 1948 until August 1949 he was a China desk officer in CIA headquarters in Washington, D. C.

• Following one year as a student at the Infantry School at Fort Benning, Georgia, he was assigned to the 82nd Airborne Division as an airborne infantry battalion executive officer. In October 1950, General Singlaub was reassigned to Fort Benning to assist in setting up the Ranger Training Center. He remained there as an instructor until the end of 1951 when he was assigned to Korea. General Singlaub spent one year as the Deputy Chief of the CIA mission in Korea, and in December 1952, he assumed command of the 2nd Battalion, 15th Infantry in the 3rd Infantry Division.

• In 1953, General Singlaub attended the Command and General Staff College at Fort Leavenworth, Kansas. Following graduation, he remained as a member of the faculty from 1954 to 1957.