The original camp had to quickly be moved to higher ground due to flooding.

XV Corps (United States) used Camp Granite as their headquarters from July- 1943 to November 1943.

When completed, the camp had 40 shower buildings, 157 latrines, 191 wooden tent frames, and a 50,000-gallon water tank.

The pass was both used as a place for troop to build defenses and as target for artillery training.

Lockheed P-38 Lightnings bombed and attacked ground targets in the pass on August 20, 1943.