1st Provisional Marine Brigade
They had about 4,095 men. They were some of the first men to enter Iceland under Major General Holland M. Smith. They stayed there for a bit with the 1st Marine Division, but the 1st MD was called to fight somewhere else, so the United States Army were the ones to come in after the 1st MD left the place to help the occupation. The 1st PMB also left with the 1st Marine Division.