War of 1812

The War of 1812 was declared by the United States against Great Britain on 18 June 1812 and formally ended with the Treaty of Ghent, signed on 24 December 1814 and ratified by the U.S. Senate in February 1815. President James Madison's war message cited three principal grievances: British impressment of American sailors into the Royal Navy, British Orders in Council restricting U.S. neutral trade during the Napoleonic Wars, and British support for Indigenous resistance to American expansion in the Northwest Territory.

The conflict unfolded across several theaters:

• The Canadian frontier, where repeated U.S. invasion attempts failed, and where British and Canadian forces, aided by Indigenous confederacies under leaders such as Tecumseh, defended Upper and Lower Canada.
• The Atlantic and Great Lakes, including Oliver Hazard Perry's victory at the Battle of Lake Erie (1813) and a British naval blockade of the U.S. coast.
• The Chesapeake, where British forces burned public buildings in Washington, D.C. in August 1814.
• The Gulf Coast, where Andrew Jackson's forces defeated the British at the Battle of New Orleans on 8 January 1815 — fought after the Treaty of Ghent was signed but before news reached North America.

The Treaty of Ghent restored the status quo ante bellum, settling none of the maritime issues that had triggered the war (these became moot with Napoleon's defeat). Its longer consequences were nonetheless significant: it consolidated American national identity, ended organized Indigenous military resistance east of the Mississippi, set the stage for the demilitarization of the U.S.–Canada border via the Rush–Bagot Agreement of 1817, and is often credited in Canadian historiography with shaping a distinct Canadian political consciousness.

In IR scholarship the war is frequently cited as an early case study in neutral-shipping rights, declared-war practice, and Anglo-American rapprochement.