This 1:50,000-scale topographic map of a karst region in Laos, part of a collection folder labeled "Boxer 22 SAR," illustrates the rugged terrain over which U.S. search-and-rescue forces operated during the Vietnam War to recover downed aircrews. Rescue missions in this region often involved close coordination between forward air controllers, rescue helicopters, and A-1 Skyraider escort aircraft. Project: 218834