The British forces in Aden were very small, numbering only a few hundred. Yet they were the first to die in the Yemen Civil War.
In early October 1962, a British army patrol of a few dozen men was ambushed in the mountains of Aden. The attackers were local tribesmen, the enemy of the British forces in the city. The ambush was successful.
The British patrol was wiped out, with all its members killed.
The Aden Campaign