Forage cap
Forage cap is the designation given to various types of military undress, fatigue or working headresses. These varied 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 known as a forage cap.
History
In the 18th century, forage caps were small cloth caps worn by British cavalrymen when undertaking work duties such as foraging for food for their horses. The term was later applied to undress caps worn by men of all branches and regiments as a substitute for the full dress headdress. The kepi widely worn during the American Civil War is sometimes mistakenly referred to as a forage cap.
Usage
French Army
During the French Revolutionary Wars, French soldiers made their own forage caps from the sleeve of an old coat. Known as the Bonnet de Police, these caps resembled a nightcap and were also worn by Santa Anna's army during the Mexican War, and by Confederate troops during the American Civil War. From the 1840s until WWII, French troops wore the blue and red kepi, but in 1915, the Bonnet de Police was reintroduced as the Garrison cap. By the 1940s, the beret was also widely worn.