Complex sentence: Reactivated as a intermediate command echelon of Strategic Air Command in February 1951, the 21st Air Division controlled B-47 Stratojet medium bombardment wings at Forbes AFB, Kansas and Lake Charles AFB, Louisiana.
Split into simpler sentences: Reactivated as a intermediate command echelon of Strategic Air Command in February 1951 at Forbes AFB, Kansas. The 21st Air Division controlled B-47 Stratojet medium bombardment wings at Forbes AFB, Kansas and Lake Charles AFB, Louisiana.