Casablanca-class escort carrier

Casablanca-class escort carrier. The Casablanca class was the most numerous class of aircraft carriers ever built, with fifty vessels constructed for the United States Navy during World War II. Designed and built rapidly by industrialist Henry J. Kaiser to address critical shortages of naval aviation platforms, these ships played a pivotal role in the Pacific War and the Battle of the Atlantic. Though small and slow compared to fleet carriers, their numbers proved indispensable for anti-submarine warfare, close air support, and aircraft transport missions.

Design and development

The class originated from an urgent wartime requirement for auxiliary aircraft carriers, leading the United States Maritime Commission to contract the Kaiser Shipyards in Vancouver, Washington. Utilizing their expertise in Liberty ship construction, Kaiser employed prefabricated sections and assembly-line techniques to achieve unprecedented production speed. The design was based on a standard C3 merchant ship hull but incorporated a full-length flight deck, a single hangar deck, and a small island structure. Key design compromises included a top speed of only 19 knots, provided by obsolete Skinner Unaflow engines, and relatively light defensive armament. The Bureau of Ships oversaw the final design, which was designated the Casablanca class, named after the lead ship, USS Casablanca (CVE-55).

Ships in class

All fifty units were built by Kaiser between 1942 and 1944 under hull numbers CVE-55 through CVE-104. Naming conventions honored early American battles (e.g., USS ''Coral Sea''), historic naval victories (e.g., USS ''Guadalcanal''), and significant bays or sounds (e.g., USS ''Gambier Bay''). The program's scale was such that five ships were launched on a single day in 1943. Notable units included USS ''St. Lo'', the first major warship sunk by a kamikaze attack during the Battle of Leyte Gulf, and USS ''Anzio'', which was credited with sinking the German submarine U-977.

Service history

Upon commissioning, these carriers were immediately deployed to combat theaters worldwide. In the Atlantic Ocean, they provided critical air cover for Allied convoys, hunting German U-boats and contributing to the closure of the Mid-Atlantic gap. In the Pacific Theater, they served as the backbone of support carrier groups, providing close air support during amphibious assaults like the Battle of Iwo Jima and the Battle of Okinawa. They also ferried replacement aircraft from Naval Air Station Alameda to forward bases. Five were lost in action: St. Lo, Gambier Bay, and USS ''Ommaney Bay'' to enemy action, and USS ''Liscome Bay'' and USS ''Bismarck Sea'' to submarine and kamikaze attacks, respectively.

Operational role

Their primary missions were anti-submarine warfare and aircraft ferry duties, but they proved versatile. They operated a typical air group of around 28 aircraft, often composed of F4F Wildcats or F6F Hellcats and TBF Avengers. In the hunter-killer role, units like USS ''Guadalcanal'', under Captain Daniel V. Gallery, captured the German submarine U-505. During major invasions, they provided continuous close air support for Marine and Army units when larger ''Essex''-class carriers were engaged in fleet actions. Their presence freed fast carrier Task Force 38 for deep strikes against the Imperial Japanese Navy.

Legacy and preservation

The Casablanca class exemplified American industrial mobilization, with all fifty ships delivered in under two years, a record unmatched in naval history. After the war, most were quickly decommissioned and sold into the Merchant Marine or scrapped by 1960. None were preserved as museums. Their design and mass-production philosophy directly influenced the subsequent Commencement Bay-class escort carrier, which was a improved, purpose-built version. The class's contribution to Allied victory, particularly in defeating the German submarine threat and supporting the island hopping campaign across the Central Pacific, cemented the escort carrier as a vital component of modern naval warfare. Their story is commemorated at institutions like the National Museum of the United States Navy and the USS Midway Museum.