Complex sentence: Reactivated in the Air Force Reserve in 1947 with B-29s, the 459th trained at Long Beach Army Air Field, California then moving in 1949 to Smoky Hill AFB, Kansas and then Barksdale AFB, Louisiana shortly afterward.
Split into simpler sentences: Reactivated in the Air Force Reserve in 1947 with B-29s. Trained at Long Beach Army Air Field, California then moving in 1949 to Smoky Hill AFB, Kansas and Barksdale AFB, Louisiana shortly afterward.