Agaron

From Memory Alpha, the free Star Trek reference

Agaron is a planet whose government was allied with the Vulcans in the 22nd century.

When the ruling government wanted to forge better relations with the Vulcan government, they asked the Vulcans for assistance. To accomplish this goal, the Vulcans dispatched 109 surgically-altered operatives who infiltrated various crime syndicates in order to topple the organizations. After the mission was accomplished, a majority of the operatives returned though several did not. (ENT: "The Seventh")