Complex sentence: Became a Parachute Jump School instructor after training in the summer of 1945 Attaining the rank of Sgt. during WWII joining the 505th Infantry regiment with the 82nd Airborne Division.
Split into simpler sentences: Became a Parachute Jump School instructor after training in the summer of 1945. Attained the rank of Sgt. during WWII joining the 505th Infantry regiment with the 82nd Airborne Division.