[3] 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.

[8] 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 ordered by the RAN, 20 (including Ipswich) ordered by the British Admiralty but manned and commissioned as RAN vessels, and 4 for the Royal Indian Navy.

From 3 November 1942 until 21 January 1945, Ipswich was assigned to the British Eastern Fleet, primarily serving in the Indian Ocean and Persian Gulf, but spending May to October 1943 in the Mediterranean.

[2] During this time, Ipswich was credited with shooting down a twin-engined bomber near Syracuse on 25 July 1943, and on 11 February 1944 worked with HMAS Launceston and HMIS Jumna to sink the Japanese submarine Ro-110.

[12] Ipswich earned five battle honours for her wartime service: "Pacific 1942", "Indian Ocean 1942–45", "Sicily 1943", "East Indies 1944", and "Okinawa 1945".