A campaign hat (also Stetson, rill instructor hat, drill sergeant hat, round brown, ranger hat, sergeant hat, Scouts hat, Smokey Bear hat, lemon squeezer) is a broad-brimmed felt hat with a high crown pinched at the four corners. It is associated with World War I ground forces of the United States Army, contemporary U.S. military drill instructors, state police forces, park rangers, Boy Scouts, the Royal Canadian Mounted Police, the Legion of Frontiersmen and others. It should not be confused with a campaign cap, or the Stetson type known as the Cowboy hat.