Coolidge on 4 June 1927. Serving as flagship of Commander, Cruiser Division 3 (CruDiv 3), Battle Force, Concord cruised the Pacific from her base at San Diego after early 1932, exercising in the Canal Zone and the Caribbean in 1934. On 12 February 1935, she rescued 11 members of the crew of the downed airship USS Macon. She took part in Presidential Fleet Reviews taken by Franklin D. Roosevelt on 30 September 1935 and 12 July 1938, and joined in fleet exercises in the Hawaiian area, in the Canal Zone, and off Alaska. After operating on the east coast in the winter of 1938–39, she returned to Pacific operations, and from 1 April 1940, was based at Pearl Harbor for a training schedule which intensified as war came closer. World War II When the US entered the war, Concord was at San Diego preparing for a shipyard overhaul which she completed early in February 1942. Assigned to the Southeast Pacific Force, she escorted convoys to Bora Bora in the Society Islands, exercised in the Canal Zone, and cruised along the coast of South America and to the islands of the southeast Pacific, serving from time to time as flagship of her force. From 5 September – 24 November 1943, with Captain Irving Reynolds Chambers, commanding, she carried Rear Admiral Richard E. Byrd on a tour to survey the potential use of a number of southeast Pacific islands in national defense and commercial aviation. During this cruise, she suffered a gasoline explosion which killed 24 men including her executive officer, and caused considerable damage, which was repaired at Balboa, Panama. With repairs completed in March 1944, Concord set sail northward to join the Northern Pacific Force at Adak on 2 April. Serving as flagship of Task Force 94 (TF 94) at the beginning of this duty, she joined in bombardments of the Kuriles which continued at intervals until the close of the war, preventing effective use by the Japanese of their bases there. Harassing the northern shipping lanes of Japan, her force sank several small craft, and on 25 August 1944, the destroyers of the force made an attack on a Japanese convoy. On 31 August 1945, Concord stood out from Adak, covered the occupation landings at Ominato, Japan, from 8–14 September, and sailed on to Pearl Harbor, the Canal Zone, Boston, and Philadelphia, where she was decommissioned on 12 December,