Complex sentence: In January 1952, he left for Hawaii, where he served until April 1952, when he embarked for Korea with Company I, 3rd Battalion, 7th Marines, 1st Marine Division as a rifleman.
Split into simpler sentences: In January 1952, he left for Hawaii, where he served until April 1952. He embarked for Korea with Company I, 3rd Battalion, 7th Marines, 1st Marine Division as a rifleman.