In December 1941, after the US entry into World War II, the USN had a large building programme for anti-submarine warfare (ASW) ships, but none nearing completion.

To overcome this shortfall, the Royal Navy agreed to transfer a number of ASW ships to the USN, including ten Flower-class corvettes.

In the event the USN only took charge of eight of these ships; the other seven were transferred back to the RN under Lend-Lease arrangements.

[2] The ten ships of the Temptress class were originally built for the Royal Navy and saw service there before transfer to the USN.

On completion eight entered service with the USN while the other seven were transferred back to the RN under Lend-lease.