Complex sentence: Not surprisingly for a town dominated by a naval base, a large majority joined the Navy while others joined the Air Corps, participating in the Doolittle Raid over Japan and battles over the Philippines and the East Indies.
Split into simpler sentences: Not surprisingly for a city dominated by a naval base, a large majority joined the Navy. Others joined the Air Corps, participating in the Doolittle Raid over Japan and battles over the Philippines and the East Indies.