Star Trek Expanded Universe

Perimeter Action Group 38 (also known as PA Group 38) was a Starfleet battle force extant in the late 23rd century. (Ships of the Star Fleet, vol. 2)

PA Group 38 consisted of USS Bengal, USS Accra and other vessels. In the early 2290s, the group was homeported at Outpost Principale.

Perimeter action groups may have been the counterpart of what were called pursuit groups in other continuities.