This is the second part of the article regarding SAS involvement in proxy operations during the Cold War. You can read Part I here.

Historically, the Mahra tribe had lived in a tri-border area that overlays Saudi Arabia, South Yemen, and Dhofar.  After the British withdrew from South Yemen in 1967, and the country went communist, the Mahra were exiled from their tribal lands.

The Mahra tribal lands (Facebook).