List of headgear of the United States Army

The United States Army in its many forms: the Continental Army, Union Army, American Volunteers, and the regular army have worn many hats, helmets and caps for both combat and ceremonial use since its founding until today. == Continental Army == 1776-1781: The Black Tricorne - While some units wore other styles of caps, the Continental Army itself wore black tricorne hats with a black or silver ribbon and a black cockade.

Source: Wikipedia — List of headgear of the United States Army (CC BY-SA 4.0)