Complex sentence: For nearly six years of World War II, Summers-Smith was an Intelligence Officer in the British Army, serving with the 9th Battalion, The Cameronians, stationed on the east coast of England.
Split into simpler sentences: For nearly six years of World War II, Summers-Smith was an intelligence officer in the British Army. He served with the 9th Battalion, The Cameronians, stationed on the east coast of England.