A campaign hat or campaign cover is a broad-brimmed felt or straw hat, with a high crown, pinched symmetrically at the four corners.
The hat is most commonly worn as part of a uniform, by such organizations as the Royal Canadian Mounted Police, the New Zealand Army, United States Park Rangers, and Scouts.
The campaign hat is occasionally referred to as a Stetson, derived from its origin in the company’s Boss of the Plains model in the late 19th century. It should not be confused with the Stetson style cowboy hat, which has a different brim and crease, nor a slouch hat.
The origins of the hat can be traced to the 1840s when U.S. Army mounted troops posted to the far-west sometimes wore wide-brimmed civilian hats, which were more practical than the regulation shakos and forage caps then issued. The crease was influenced by the designs of the sombreros worn by the Mexican Vaqueros.
The name started to be used after the 1872–1876 regulations, which introduced a black felt hat—which could be drab after 1883—for fatigue use derived from the types popularized during the American Civil War. scottish hat were worn with campaign cords, mainly as a form of decoration.