Complex sentence: He served in the Canadian Army during World War II rising from the rank of Private to lieutenant-colonel and also remained a provincial Liberal backbencher until 1943 as well as serving again as Mayor of Windsor.
Split into simpler sentences: He served in the Canadian Army during World War II, rising from the rank of Private to lieutenant-colonel. He remained a provincial Liberal backbencher until 1943, as well as serving again as Mayor of Windsor.