Complex sentence: The British 52nd (Lowland) Division was a World War I Territorial Army division that fought at Gallipoli, in the Middle East (Sinai and Palestine) and on the Western Front in France.
Split into simpler sentences: The British 52nd (Lowland) Division was a Territorial Army division. During World War I the division fought at Gallipoli, in the Middle East (Sinai and Palestine) and on the Western Front in France.