Complex sentence: During the Second World War, the critical strategic importance of Liverpool was recognised by both Hitler and Churchill, with the city suffering a blitz second only to London's, and the pivotal Battle of the Atlantic being planned, fought and won from Liverpool.
Split into simpler sentences: During the Second World War, the critical strategic importance of Liverpool was recognised by both Hitler and Churchill, with the city suffering a blitz second only to London's. The pivotal Battle of the Atlantic was planned, fought and won from Liverpool.