Complex sentence: In 1942 Leroy Anderson joined the U.S. Army, and was assigned in Iceland as a translator and interpreter; in in 1945 he was reassigned to the Pentagon as Chief of the Scandinavian Desk of Military Intelligence.
Split into simpler sentences: In 1942 Leroy Anderson joined the U.S. Army, and was assigned to Iceland as a translator and interpreter. Later in 1945 he was assigned to the Pentagon as Chief of the Scandinavian Desk of Military Intelligence.