Seattle-Tacoma Shipbuilding Corporation
After the Attack on Pearl Harbor, the US Navy acquired 22 C3 merchant ships that were in varying states of construction, to be converted into escort carriers. Eleven of these were transferred to the Royal Navy as the "Attacker" class, while the 11 retained by the US were named the . They were all laid down in 1941 and 1942, with Ingalls Shipbuilding and Western Pipe &amp; Steel building four each and Seattle-Tacoma Shipbuilding Corporation erecting the additional three, and supplied under the terms of the Lend-Lease program.