The Edsall class destroyer escorts were built primarily for ocean anti-submarine escort service during World War II. The lead ship, USS Edsall (DE-129) was commissioned on 10 April 1943 at Orange, Texas. The class was also known as the FMR type from their Fairbanks-Morse Reduction-geared diesel drive used in the submarines of the time. The FMR's substitution for a diesel-electric power plant was the essential difference from the predecessor Cannon ("DET") class. This was the only World War II DE class in which all the ships originally ordered were completed as United States Navy destroyer escorts. Destroyer escorts were regular companions escorting the vulnerable cargo ships. Late in the war, plans were made to replace the 3" guns with 5" guns but only USS Camp (DE-251) was refitted (after