Complex sentence: General Sir John Tredinnick Crocker, (4 January 1896--9 March 1963) was a senior officer of the British Army who served as a private soldier and junior officer in the First World War, and as a corps commander during the Second World War.
Split into simpler sentences: General Sir John Tredinnick Crocker, (4 January 1896--9 March 1963) was a senior British Army officer who fought in both world wars. He served as a private soldier and junior officer in the First World War, and as a corps commander during the Second World War.