Complex sentence: He was given command of the frigate HMS "Eskimo" in 1976 and, having been promoted to Captain, he joined the Operational Requirements Division at the Ministry of Defence in 1981 and was given command of HMS "Southampton" in 1986.
Split into simpler sentences: He was given command of HMS "Eskimo" in 1976. Promoted to Captain, he joined the Operational Requirements Division at the Ministry of Defence in 1981 and was given command of HMS "Southampton" in 1986.