Complex sentence: He subsequently served with No.1 Commando on special duties and in India as OC A Company, before he joined the 51st Highland Division in Possy area in August 1944, for the break-out from the Normandy bridgehead.
Split into simpler sentences: He subsequently served with No.1 Commando on special duties with OC A Company in India. After returning from India in August 1944 he joined the 51st Highland Division in Possy area, for the break-out from the Normandy bridgehead.