The Fencibles (from the word defencible) were army regiments raised in the United Kingdom and in the colonies for defence against the threat of invasion during the American War of Independence and French Revolutionary Wars in the late 18th century. Usually temporary units, composed of local volunteers, commanded by Regular Army officers, their role was, as their name suggests, confined to garrison and patrol duties, freeing the regular Army units to perform offensive operations. They had no liability for overseas service.

They included naval forces known as "River Fencibles", made up of boatmen on the Thames and other southern English towns and cities, as well as Sea Fencibles, who, among their other duties, manned small commercial vessels converted to coastal defense.

Read more about Fencibles:  Standards, American Use