Complex sentence: He was assigned to the headquarters of the Tactical Air Command at Langley AFB, Virginia, in March, where he remained until volunteering for assignment to Korea, where he arrived in February 1952 after transition training in the F-86 Sabre.
Split into simpler sentences: He was assigned to the headquarters of the Tactical Air Command at Langley AFB, Virginia, in March, where he remained until volunteering for assignment in the Korean War. He arrived in Korea in February 1952 after transition training in the F-86 Sabre.