THE TRICORNER HAT The tricorner hat - that is, it has three corners - was once commonly used, and later fell into more restricted use, as government officials adopted its use. The Tricorner style of hat that was common in the late 17th and 18th centuries, and in certain areas, in the19th century. The tricorner hat was common in the American colonies and in Upper Canada in the 19th century.
In the United States, farmers and average Joes wore the tricorner hat, and during the Revolutionary War period it was an extremely popular hat .Today it is commonly used during historical battle re-enactments of the United States Revolutionary War. So prevalently worn during an such an important time in our history - the revolution - the tricorner hat has become preserved in our consciousness as a patriotic symbol of the period.