USS Concord (CL-10) was an light cruiser, originally classified as a scout cruiser, of the United States Navy. She was the fourth Navy ship named for the town of Concord, Massachusetts, the site of the first battle of the American Revolution. She spent the first nine years of her career in the Atlantic as part of the Scouting Force. Concord transferred to the Pacific in 1932 and spent the rest of her career, except for the winter of 1938–1939, stationed there. Her home port moved to Pearl Harbor in April 1940, but she escaped the attack on Pearl Harbor because she was in San Diego for an overhaul. Built in Philadelphia, Pennsylvania Concord was authorized on 29 August 1916, and assigned to William Cramp & Sons, Philadelphia on 30 July 1917. She was laid down on 29 March 1920, and launched on 15 December 1921, sponsored by Miss H. Butterick. Concord was commissioned on 3 November 1923, with future Admiral, Captain Orin G. Murfin in command. Concord was long at the waterline with an overall length of , her beam was and a mean draft of . Her standard displacement was and at full load. Her crew, during peace time, consisted of 29 officers and 429 enlisted men. Concord was powered by four Parsons steam turbines geared steam turbines, each driving one screw, using steam generated by 12 White-Forster boilers. The engines were designed to produce and reach a top speed of . She was designed to provide a range of at a speed of , but was only capable of at a speed of Concords main armament went through many changes while she was being designed. Originally she was to mount ten /53 caliber guns; two on either side at the waist, with the remaining eight mounted in tiered casemates on either side of the fore and aft superstructures. After America's entry into World War I the US Navy worked alongside the Royal Navy and it was decided to mount four 6-in/53 caliber guns in two twin gun turrets fore and aft and keep the eight guns in the tiered casemates so that she would have an eight gun broadside and, due to limited arcs of fire from the casemate guns, four to six guns firing fore or aft. Her secondary armament consisted of two /50 caliber anti-aircraft guns in single mounts. Concord was initially built with the capacity