World War II Shipbuilding in Duluth and Superior

World War II hinged on the Allies having enough ships to both fight the enemy and to carry millions of tons of war goods across the world's oceans. Shipyards on the Atlantic, Gulf, and Pacific Coasts built thousands of vessels, but America's sometimes forgotten Fourth Coast, the Great Lakes, built hundreds of ships as well. From 1940 to 1945, warships, cargo haulers, Coast Guard tenders, and fleet service auxiliaries of many types were launched from the two cities of Duluth, Minnesota, and Super