In May 1950, he took command of the Seventh Fleet, leading that force through the difficult first year of the Korean War, including the landings at Inchon and Wonsan. For a year, beginning in March 1951, Vice Admiral Struble was Commander, First Fleet, then served briefly with the Joint Chiefs of Staff before being assigned successively to head the U.S. Naval and U.S. Military delegations to the United Nations' Military Staff Committee. From June 1955, he was Commander Eastern Sea Frontier and Commander Atlantic Reserve Fleet. Upon his retirement from active duty in July 1956, he was advanced to the rank of admiral on the basis of his combat awards.