Complex sentence: After the season, Sturm enlisted in the United States Army and served in World War II. He was out of professional baseball from 1942 to 1945 and lost the tip of his right index finger in a tractor accident.
Split into simpler sentences: After the season, he enlisted in the United States Army and served in World War II. He was out of professional baseball from 1942 to 1945. He lost the tip of his right index finger in a tractor accident.