Complex sentence: On 1 April 1956 Seymour Johnson Air Force Base was reactivated as a Tactical Air Command with the 4435th Air Base Squadron being the initial host unit.
Split into simpler sentences: On 1 April 1956 Seymour Johnson Air Force Base was reactivated as a United States Air Force base under Tactical Air Command. The 4435th Air Base Squadron being the initial host unit.