[1] In 1938, the Australian Commonwealth Naval Board (ACNB) identified the need for a general purpose 'local defence vessel' capable of both anti-submarine and mine-warfare duties, while easy to construct and operate.

[6] The need for locally built 'all-rounder' vessels at the start of World War II saw the "Australian Minesweepers" (designated as such to hide their anti-submarine capability, but popularly referred to as "corvettes") approved in September 1939, with 60 constructed during the course of the war: 36 (including Cowra) ordered by the RAN, 20 ordered by the British Admiralty but manned and commissioned as RAN vessels, and 4 for the Royal Indian Navy.

[1] She was launched on 27 May 1943 by the wife of Percy Spender, the Federal Treasurer and member of the Advisory War Council, and was commissioned into the RAN on 8 October 1943.

[1] In January 1945, Cowra fired on Japanese shore positions at Yalela Bay, before visiting Brisbane briefly in February 1945.

[10][11] Following the end of the war, Cowra was assigned to the 20th Minesweeping Flotilla, and performed mine clearance operations in the waters of Australia, New Guinea, and the Solomon Islands.