Complex sentence: Battery D did not lose any men while under Truman's command in France; to show their appreciation of his leadership, his men presented him with a large loving cup upon their return to the United States after the war.
Split into simpler sentences: Battery D did not lose any men while under Truman's command in France. To show their appreciation of his leadership, his men presented him with a large loving cup upon their return to the United States after the war.