The answer to this question may seem somewhat obvious, but in reality the War of 1812, which did, in fact, begin in 1812, was an extension of a long-running conflict between the United States and Great Britain over maritime issues and the alleged British role in supporting Native American groups in frontier conflicts with the United States. The United States declared war in 1812, and the war lasted until 1815. It witnessed a failed US invasion of Canada, the British occupation and burning of much of Washington, D.C., and several indecisive naval conflicts. The greatest American victory occurred at the Battle of New Orleans, where American forces under Andrew Jackson heavily defeated a British invasion force. Ironically, this battle occurred in January of 1815, about two weeks after American and British representatives had signed the Treaty of Ghent that ended the war. The news had not yet had time to reach the United States.