Forage cap is the designation given to various types of military undress, fatigue or working headwear. These vary widely in form, according to country or period. The coloured peaked cap worn by the modern British Army for parade and other dress occasions is still officially designated as a forage cap.

The kepi is a cap with a flat circular top and a peak, or visor. In English, the term is a loanword from French: képi, itself a re-spelled version of the Alemannic German: Käppi, a diminutive form of Kappe, meaning "cap". In Europe, the kepi is most commonly associated with French military and police uniforms, though versions of it were widely worn by other armies during the late 19th and early 20th centuries. In North America, it is usually associated with the American Civil War, as it was worn by soldiers on both sides of the conflict.