This article needs additional citations for verification. (June 2019)
The list of ship commissionings in 1940 includes a chronological list of ships commissioned in 1940. In cases where no official commissioning ceremony was held, the date of service entry may be used instead.
- Parsons, Luann (9 April 1981). "Abbot I (Destroyer No. 184)". Dictionary of American Naval Fighting Ships. Naval History and Heritage Command. Retrieved 19 August 2019.
Abbot was recommissioned on 17 June 1940
- "Aaron Ward I (Destroyer No. 132)". Dictionary of American Naval Fighting Ships. Naval History and Heritage Command. 1 September 2016. Retrieved 13 June 2019.
On 9 September 1940, Aaron Ward was decommissioned at Halifax, Nova Scotia. Transferred to Great Britain as one of the overage destroyers traded to that nation in return for the right to establish American bases on British possessions in the western hemisphere, she was commissioned in the Royal Navy that same day as HMS Castleton, 44-year old Cmdr. Frank H. E. Skyrme, RN (Ret.), in command.
- "Abel P. Upshur (Destroyer No. 193)". Dictionary of American Naval Fighting Ships. Naval History and Heritage Command. 23 February 2016. Retrieved 11 September 2019.
British on 9 September 1940. She was assigned to the 1st "Town-class" Flotilla
|Ship events in 1940|