Casablanca was the principal French Atlantic naval base after German occupation of the European coast. The Naval Battle of Casablanca resulted from a sortie of French cruisers, destroyers, and submarines opposing the landings. A cruiser, six destroyers, and six submarines were destroyed by American gunfire and aircraft. The incomplete French battleship Jean Bart—which was docked and immobile—fired on the landing force with her one working gun turret until disabled by American gunfire. Two American destroyers were damaged.