Complex sentence: Additionally on 22 June 1940, a British Commando unit, No.2 Commando was turned over to parachute duties and on 21 November, re-designated the 11th Special Air Service Battalion, with a parachute and glider wing.
Split into simpler sentences: Additionally on 22 June 1940, a British Commando unit, No.2 Commando was convertd to parachute duties. On 21 November, it was re-designated the 11th Special Air Service Battalion, with a parachute and glider wing.