RCAF Overseas Headquarters

The Royal Canadian Air Force Overseas Headquarters, often abbreviated to RCAF Overseas, was responsible for Canadian airmen serving outside Canada during and just after World War II. The headquarters was established on 1 January 1940 and it was based in London. Its main functions were to conduct liaison with the British Air Ministry, to provide a central location for personnel records, and provide general administration.

Source: Wikipedia — RCAF Overseas Headquarters (CC BY-SA 4.0)