A conflict between the US and the UK (1812–14), prompted by restrictions on US trade resulting from the British blockade of French and allied ports during the Napoleonic Wars, and by British and Canadian support for North American Indians trying to resist westward expansion. It was ended by a treaty which restored all conquered territories to their owners before outbreak of war.
Definition of War of 1812 in US English:
War of 1812
proper noun
A conflict between the US and the UK (1812–14), prompted by restrictions on US trade resulting from the British blockade of French and allied ports during the Napoleonic Wars, and by British and Canadian support for North American Indians trying to resist westward expansion. It was ended by a treaty which restored all conquered territories to their owners before outbreak of war.