Troops began wearing berets as a part of the headgear of military uniforms in some European countries during the 19th century; since the mid-20th century, they have become a component of the uniforms of many armed forces throughout the world. Military berets are usually pushed to the right to free the shoulder that bears the rifle on most soldiers, but the armies of some countries, mostly within Europe, South America, and Asia, have influenced the push to the left.

A beret is a soft, round, flat-crowned cap, usually of woven, hand-knitted wool, crocheted cotton, wool felt, or acrylic fibre.