Complex sentence: Upon his return from Hanover to the Prussian Main Military Academy, Strachwitz was appointed sports-officer for the Gardes du Corps, where he introduced the soldiers to daily gymnastics and weekly endurance running.
Split into simpler sentences: Upon his return from Hanover to the Prussian Main Military Academy, Strachwitz was appointed sports-officer for the Gardes du Corps, where he helped develop a physical fitness program for soldiers. He introduced the soldiers to daily gymnastics and weekly endurance running.