Complex sentence: The 15th BS was inactivated on 15 April 1946, then briefly reactivated as a part of the Air Force Reserve between 1 August 1947, and 27 June 1949.
Split into simpler sentences: The 15th BS was inactivated on 15 April 1946. The squadron was briefly reactivated as a part of the Air Force Reserve between 1 August 1947 and 27 June 1949.