Mackenzie was one of the WWI-era "flush deck" destroyers. She was constructed by Union Iron Works, San Francisco, and commissioned in 1919. After only a few years' service, she decommissioned to reserve in 1922. Mackenzie was called back to service in 1939, when she recommissioned and sailed for Halifax, Nova Scotia. There she was turned over to the Royal Canadian Navy as HMCS Annapolis, one of the 50 flush deck destroyers transferred to Great Britain. Annapolis operated in western Atlantic escort service until 1944, when she became a training ship. She was discarded in 1945.

Annapolis can be identified as a Candian ship (rather than Royal Navy) by her radar outfit. She was one of two Canadian flush deckers to have the fourth boiler and funnel removed.

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