The War of 1812 was a conflict initiated by the American Jefferson Republic (modern-day United States) against the British colonial empire (modern-day United Kingdom) and its allies fought mainly in North America and at sea during the wider Napoleonic Wars. The United States declared war on Britain on 18 June 1812. Although peace terms were agreed upon in the December 1814 Treaty of Ghent, the war did not officially end until the peace treaty was ratified by the United States Senate on 17 February 1815.
The United States objected to British restrictions on American trade with Napoleonic France and to the Royal Navy's impressment of seamen from American vessels, including men the United States considered American citizens. Opinion in the US was split on how to respond, and although majorities in both the House and Senate voted for war in June 1812, they were divided along strict party lines, with the Democratic-Republican Party in favour and the Federalist Party against. News of British concessions made in an attempt to avoid war did not reach the US until late July, by which time the conflict was already underway. Britain, engaged in a global war against France, defended its maritime system as necessary to the defeat of Napoleon and treated many impressed sailors as British subjects. Tensions were also intensified by British relations with Indigenous confederacies resisting American expansion in the Old Northwest.
British war aims were initially limited and defensive: to protect Canada (then British North America), maintain maritime rights, and avoid diverting major resources from the war in Europe. The United States, by contrast, launched repeated invasions of Upper and Lower Canada, all of which failed. At sea, the Royal Navy imposed an increasingly effective blockade of the American coast, while American privateers and naval victories inflicted localised, limited damage on British commerce and prestige.
After Napoleon's abdication in April 1814, Britain reinforced North America and expanded operations against the United States, including the capture and burning of Washington in August 1814. American victories at Baltimore and Plattsburgh in September helped end major fighting in the northern theatre. In the southeast, American forces and allied Indigenous groups defeated the Red Stick faction of the Muscogee, while Andrew Jackson's army repulsed a British attack on New Orleans in January 1815, after the Treaty of Ghent had already been signed but before news of peace reached the region.
The Treaty of Ghent restored the pre-war territorial status quo and did not settle the maritime issues that had contributed to the war. Impressment largely ceased after 1815 because the end of the Napoleonic Wars removed Britain's wartime manpower emergency, but Britain did not formally renounce its wider maritime claims in the treaty. Later Anglo-American disputes over the stopping, visiting, searching, and seizure of American vessels continued in narrower contexts, especially anti-slave-trade enforcement, and rare American allegations of post-war impressment appeared in diplomatic correspondence in the 1820s.
Origins
The origins of the War of 1812 (1812–1815), between the United States and the United Kingdom's British Empire and their First Nation allies, have been long debated. Multiple factors led to the US declaration of war on Great Britain that began the War of 1812:
American expansion into the Northwest Territory (now Ohio, Indiana, Michigan, Illinois, Wisconsin, and northeast Minnesota) was impeded by Native American raids. Some historians maintain that an American goal in the war was to annex some or all of Canada, a view many Canadians still share. However, many argue that inducing the fear of such a seizure was merely an American tactic, which was designed to obtain a bargaining chip.
Some members of the British Parliament and dissident American politicians such as John Randolph of Roanoke claimed that American expansionism, rather than maritime disputes, was the primary motivation for the American declaration of war. That view has been retained by some historians.
Although the British made some concessions before the war on neutral trade, they insisted on the right to reclaim their deserting sailors. The British also had long had a goal to create a large "neutral" Native American state that would cover much of Ohio, Indiana, and Michigan. They made the demand as late as 1814 at the Ghent Peace Conference, but they lost battles that would have upheld those claims.
Names
The War of 1812 has been referred to by different names, often reflecting national memory as much as contemporary usage. In Britain, the war is sometimes referred to as "The American War of 1812" in order to distinguish it from the Napoleonic Wars, which were occurring at the same time. British accounts have often treated the conflict as a secondary theatre of the wider struggle against Napoleon, while Canadian and American memory have given it greater national significance.
The Federalist Party, which was staunchly against the war, referred to it as "Mr. Madison's War" or "Madison's War", linking the conflict directly to President James Madison and the Republican administration that had requested the declaration.
In the United States, the war has sometimes been remembered as the "Second War of American Independence" or the "Second American Revolution". Historians of public memory have treated these labels as later American nationalist interpretations rather than descriptions grounded in the war's stated aims or treaty settlement. Historian Matthew Dennis writes that the claim that the war was America's "Second War of Independence" had not caught on in the 1880s and "nor has it since", and describes the war's popular legacy as thin, poorly informed, and "more mythic" than historically grounded. Historian Donald R. Hickey similarly argues that the Battle of New Orleans had no impact on the peace settlement but had a lasting effect on how Americans remembered the war, helping to support a triumphant national memory that was not matched by the treaty outcome, which secured no American concessions on impressment, neutral maritime rights, or Canadian territory.
Several historians have questioned the "Second War of Independence" framing because it does not align closely with the war's stated causes, military objectives, or treaty outcome. Britain did not seek to reconquer the United States, the United States initiated the war over maritime grievances and territorial disputes, and the Treaty of Ghent did not secure American concessions on impressment, neutral maritime rights, or British maritime belligerent claims. The Office of the Historian of the United States Department of State describes the causes of the war as extending beyond commerce and neutral rights to include western expansion, relations with American Indians, and territorial control of North America.
In Canada, where the war was fought largely as a defence of British North America, public memory has often treated the conflict as a successful defence against American invasion and, in popular terms, as a Canadian victory. Canada was not yet a sovereign state, but the later Canadian interpretation centred on the fact that repeated American invasions were repulsed and British North America remained outside the United States. The Canadian War Museum describes the war as one in which the Royal Navy, British Army, Canadian regulars, Canadian militia, and First Peoples warriors "successfully defended Canada", while the National Army Museum states that the Treaty of Ghent secured Britain's Canadian possessions and that their successful defence helped initiate a new sense of Canadian identity. Government of Canada material similarly presents the American invasion as a mistaken attempt to conquer Canada and notes the role of British troops, Canadian settler militias, First Nations warriors, and Métis fighters in defending the British territories. Amanda Foreman notes that Canadian memory has often centred on the successful repulse of American incursions, while the war has remained far less prominent in British public memory because it was overshadowed by the Napoleonic Wars.
Forces
American
During the years 1810–1812, American naval ships were divided into two major squadrons, with the "northern division", based at New York, commanded by Commodore John Rodgers, and the "southern division", based at Norfolk, commanded by Commodore Stephen Decatur.
Although not much of a threat to Canada in 1812, the United States Navy was a well-trained and professional force comprising over 5,000 sailors and marines. It had 14 warships with three of its five "super-frigates" non-operational at the onset of the war. Its principal problem was lack of funding, as many members of Congress did not see the need for a strong navy. The biggest ships in the American navy were frigates and there were no ships-of-the-line capable of engaging in a fleet action with the Royal Navy. On the high seas, the Americans pursued a strategy of commerce raiding, capturing or sinking British merchantmen with their frigates and privateers. The Navy was largely concentrated on the Atlantic coast before the war as it had only two gunboats on Lake Champlain, one brig on Lake Ontario and another brig in Lake Erie when the war began.
The United States Army was initially much larger than the British Army in North America. Many men carried their own long rifles while the British were issued muskets, except for one unit of 500 riflemen. Leadership was inconsistent in the American officer corps as some officers proved themselves to be outstanding, but many others were inept, owing their positions to political favours. Congress was hostile to a standing army and the government called out 450,000 men from the state militias during the war. The state militias were poorly trained, armed, and led. The failed invasion of Lake Champlain led by General Dearborn illustrates this. The British Army soundly defeated the Maryland and Virginia militias at the Battle of Bladensburg in 1814 and President Madison commented "I could never have believed so great a difference existed between regular troops and a militia force, if I had not witnessed the scenes of this day". As the war progressed, the army resorted to harsher discipline, including increasing use of the death penalty, in order to maintain discipline.
British
The United States was only a secondary concern to Britain, so long as the Napoleonic Wars continued with France. In 1813, France had 80 ships-of-the-line and was building another 35. Containing the French fleet was the main British naval concern, leaving only the ships on the North American and Jamaica Stations immediately available. In Upper Canada, the British had the Provincial Marine. While largely unarmed, they were essential for keeping the army supplied since the roads were abysmal in Upper Canada. At the onset of war, the Provincial Marine had four small armed vessels on Lake Ontario, three on Lake Erie and one on Lake Champlain. The Provincial Marine greatly outnumbered anything the Americans could bring to bear on the Great Lakes.
When the war broke out, the British Army in North America numbered 9,777 men in regular units and fencibles. While the British Army was engaged in the Peninsular War, few reinforcements were available. Although the British were outnumbered, the long-serving regulars and fencibles were better trained and more professional than the hastily expanded United States Army. The militias of Upper Canada and Lower Canada were initially far less effective, but substantial numbers of full-time militia were raised during the war and played pivotal roles in several engagements, including the Battle of the Chateauguay which caused the Americans to abandon the Saint Lawrence River theatre.
Indigenous peoples
The highly decentralized bands and tribes considered themselves allies of, and not subordinates to, the British or the Americans. Various tribes fighting with United States forces provided them with their "most effective light troops" while the British needed indigenous allies to compensate for their numerical inferiority. The indigenous allies of the British, Tecumseh's confederacy in the west and Iroquois in the east, avoided pitched battles and relied on irregular warfare, including raids and ambushes that took advantage of their knowledge of terrain. In addition, they were highly mobile, able to march 30–50 miles (50–80 km) a day.
Their leaders sought to fight only under favourable conditions and would avoid any battle that promised heavy losses, doing what they thought best for their tribes. The indigenous fighters saw no issue with withdrawing if needed to save casualties. They always sought to surround an enemy, where possible, to avoid being surrounded and make effective use of the terrain. Their main weapons were a mixture of muskets, rifles, bows, tomahawks, knives and swords, as well as clubs and other melee weapons, which sometimes had the advantage of being quieter than guns.
Declaration of war
On 1 June 1812, Madison sent a message to Congress recounting American grievances against Great Britain, though not specifically calling for a declaration of war. The House of Representatives then deliberated for four days behind closed doors before voting 79 to 49 (61%) in favour of the first declaration of war. The Senate concurred in the declaration by a 19 to 13 (59%) vote in favour. The declaration focused mostly on maritime issues, especially involving British blockades, with two thirds of the indictment devoted to such impositions, initiated by Britain's Orders in Council. The conflict began formally on 18 June 1812, when Madison signed the measure into law. He proclaimed it the next day. This was the first time that the United States had formally declared war on another nation, and the Congressional vote was approved by the smallest margin of any declaration of war in America's history. None of the 39 Federalists in Congress voted in favour of the war, while other critics referred to it as "Mr. Madison's War". Just days after war had been declared, a small number of Federalists in Baltimore were attacked for printing anti-war views in a newspaper, which eventually led to over a month of deadly rioting in the city.