Complex sentence: Several weeks later on September 7, Davis was ordered to the 554th Air Base Unit in Memphis, Tennessee, where he served on one of the Army Air Corps aerobatic demonstration teams, the predecessors to the United States Air Force Thunderbirds.
Split into simpler sentences: Several weeks later on September 7, he was ordered to the 554th Air Base Unit in Memphis, Tennessee. Here, Davis served on one of the Army Air Corps aerobatic demonstration teams, the predecessors to the United States Air Force Thunderbirds.