Epaulet

Epaulette (/ˈɛpəlɛt/; also spelled epaulet) is a type of ornamental shoulder piece or decoration used as insignia of rank by armed forces and other organizations. In several European armies, epaulettes are also worn by all ranks of elite or ceremonial units when on parade.

Epaulettes are fastened to the shoulder by a shoulder strap or "passant", a small strap parallel to the shoulder seam, and the button near the collar, or by laces on the underside of the epaulette passing through holes in the shoulder of the coat. Colloquially, any shoulder straps with marks are also called epaulettes. The placement of the epaulette, its color and the length and diameter of its bullion fringe are used to signify the wearer's rank. At the join of the fringe and the shoulderpiece is often a metal piece in the form of a crescent. Although originally worn in the field, epaulettes are now normally limited to dress or ceremonial military uniforms.

Epaulette is a French word meaning "little shoulder" (diminutive from épaule, meaning "shoulder").

Epaulettes bear some resemblance to the shoulder pteruges of ancient Roman military costumes. However their direct origin lies in the bunches of ribbons worn on the shoulders of military coats at the end of the 17th century, which were partially decorative and partially intended to prevent shoulder belts from slipping. These ribbons were tied into a knot which left the fringed end free. This established the basic design of the epaulette as it evolved through the 18th and 19th centuries.

From the 18th century on, epaulettes were used in the French and other armies to indicate rank. The rank of an officer could be determined by whether an epaulette was worn on the left shoulder, the right shoulder or on both. Later a "counter-epaulette" (with no fringe) was worn on the opposite shoulder of those who wore only a single epaulette. Epaulettes were made in silver or gold for officers, and in cloth of various colors for the enlisted men of various arms. Certain categories of cavalry wore flexible metal epaulettes referred to as shoulder scales, rarely worn on the field.

...
Wikipedia