Apart from exchanges, we don't tend to employ people from other countries in our armed forces
Having signed on the dotted line in Salisbury, Rhodesia, I was not surprised when our boss told us in 1964 that 30% of the active aircrew in the RAF where 'Dominion, Colonial or Overseas'. We had eight of us on our squadron at the time and it was a V force squadron. It did not seem to change a lot for the next decade.