Complex sentence: Convinced that war was coming and that he would be drafted, Kepford enlisted in the United States Navy Reserve, publicly signing up during the halftime ceremony of the season's final football game on November 22,1941.
Split into simpler sentences: Convinced that war was coming and that he would be drafted, Kepford enlisted in the United States Navy Reserve. He publicly "signed up" during the halftime ceremony of the season's final football game on November 22,1941.