Rank and organization: Rear Admiral, U.S. Navy. Born: 26 July 1892, San Francisco, Calif. Appointed from: California. Entered service at: Oakland, Calif. Other Navy award: Distinguished Service Medal.
Citation... For extraordinary heroism and conspicuous intrepidity above and beyond the call of duty during action against enemy Japanese forces off Savo Island on the night of 12-13 November 1942. Although out-balanced in strength and numbers by a desperate and determined enemy, Rear Adm. Callaghan, with ingenious tactical skill and superb coordination of the units under his command, led his forces into battle against tremendous odds, thereby contributing decisively to the rout of a powerful invasion fleet, and to the consequent frustration of a formidable Japanese offensive.