Complex sentence: Reassigned to Air Defense Command, becoming part of the Fourth Air Force, Western Air Defense Force, being moved to Moses Lake AFB, Washington, its mission being the air defense of eastern Washington, including the Grand Coolie Dam and the Hanford Nuclear Reservation.
Split into simpler sentences: Reassigned to Air Defense Command, becoming part of the Western Air Defense Force, being moved to Moses Lake AFB, Washington. In Washington the squadron's mission was the air defense of eastern Washington, including the Grand Coulee Dam and the Hanford Nuclear Reservation.