Complex sentence: In late 1945, the field was reported to the War Assets Administration (WAA) as being in surplus and between April 1946 and June 1947, the WAA sold or moved the on-site equipment to locations where they could be better utilized.
Split into simpler sentences: In late 1945, the field was reported to the War Assets Administration (WAA) as being in surplus. Between April 1946 and June 1947, the WAA sold or moved the on-site equipment to locations where they could be better utilized.