Green beret
U.S. Special Forces wear the green beret as a distinction of excellence and uniqueness within the Army.
Military beret
Today, every British military unit wears a beret, with the exception of the Royal Regiment of Scotland and Royal Irish Regiment, who wear the tam o'shanter and the caubeen respectively (the Scots Guards and Irish Guards, however, wear berets, as frequently do the Royal Irish Regiment on operations). Many of these berets are in distinctive colours and all are worn with the cap badge of the service, regiment or corps. The cap badge for all services in the UK is usually worn directly over the left eye.