Complex sentence: In April 1942 the squadron personnel without any aircraft were shipped to Egypt, although they arrived in June 1942 they did not acquire any aircraft until October when Gloster Gladiators were used for training.
Split into simpler sentences: In April 1942 the squadron personnel, without their aircraft, were shipped to Egypt. They arrived in June, but did not acquire any aircraft until October when Gloster Gladiators were used for training.