When the United States and the United Kingdom went to war against each other in 1812, the major land theatres of war were Upper Canada (broadly the southern portion of the present day province of Ontario), Michigan Territory, Lower Canada (roughly the southern part of present-day Quebec) and the Maritime Provinces of Nova Scotia, New Brunswick, Prince Edward Island and Cape Breton (colony between 1784 and 1820). Each of the separate British administrations formed regular and fencible units, and both full-time and part-time militia units, many of which played a major part in the fighting over the two and a half years of the war. Fencibles Fencibles were military units raised on the same terms as regular troops, but liable for service only in North America. Atlantic provinces New Brunswick Regiment of Fencible Infantry This regiment was raised in 1803. Although established as Fencibles, the regiment volunteered for general service, and became the 104th (New Brunswick) Regiment of Foot in the British Army in 1810. Nevertheless, they served in North America only. Their red uniforms had buff facings. The unit was trained in light infantry tactics with the intention of being formally converted to light infantry. Like light infantry units, they used bugles instead of drums to pass commands on the battlefield. There were many skilled axe-men and boatmen in the regiment. Their pre-war training also emphasized winter manoeuvres and amphibious operations. They made an epic winter march from Fredericton to Kingston in early 1813. Detachments from the regiment fought at the Battle of Sackett's Harbor and in the various campaigns on the Niagara peninsula. The flank companies suffered heavy casualties in a failed storming attempt during the Siege of Fort Erie. The unit was disbanded in 1817. The regiment is commemorated within the Canadian Army by the Royal New Brunswick Regiment which also carries the battle honour awarded to the regiment in the aftermath of the conflict for its contribution on the Niagara peninsula, particularly at the Battle of Lundy's Lane. Another unit, also known as the New Brunswick Fencibles, was formed in 1813 to garrison various posts in the Maritime Provinces, and was disbanded in 1816. Nova Scotia Fencibles The Nova Scotia Fencibles was raised in 1803. The unit had red uniforms with yellow facings. Although posted to Kingston in Upper Canada in 1814, the regiment did not see action and was disbanded in 1816. Half the unit,