Complex sentence: The 18th Infantry Division was a Division of the British Army in the Second World War, a duplicate of the 54th (East Anglian) Division using mostly units with connections to East Anglia.
Split into simpler sentences: The 18th Infantry Division was a Division of the British Army in the Second World War. It was a duplicate of the 54th (East Anglian) Division using mostly units with connections to East Anglia.