On April 29, 1940, the governments of Canada, Great Britain, Australia
and New Zealand got together in Ottawa to sign an agreement implementing
the "British Commonwealth Air Training Plan". Shortly after the signing
of the agreement, several other members of the Empire came on board,
including South Africa, Southern Rhodesia and India. Then, by agreement
with the USA, five stations were opened in that country. During the life
of the Plan, the stations used in the training totaled 333, and the
number of airmen trained exceeded 300,000. (From "The Making of an
Airman")