Complex sentence: It reorganized and redesignated 1 April 1954 as the 64th Transportation Company until it was inactivated 1 June 1955 on Okinawa, after the Korean war.
Split into simpler sentences: It reorganized and redesignated 1 April 1954 as the 64th Transportation Company. It became inactive 1 June 1955 on Okinawa, after the Korean war.