Operation Beaver Cage

The [USS Seminole (AKA-104)] participated in Operation "Beaver Cage," an amphibious and helicopterborne assault in support of the 1st Marine Division from 28 April to 13 May. Planning commenced immediately for operation "Beau Charger," an amphibious and helicopter assault for a search and destroy operation near the DMZ. This operation, executed between 18 and 22 May, inflicted losses upon the enemy in an area he had considered his sanctuary.

http://www.hazegray.org/danfs/amphib/aka104.htm