Complex sentence: In April 1964 Engen received his first command as captain of the, he would command the ship until 31 August 1965 when he left to attend the Naval War College in preparation for taking command of.
Split into simpler sentences: In April 1964, he received his first command as captain of the. He would command the ship until 31 August 1965 when he left to attend the Naval War College, in preparation for taking command of.