Answer:
Causes: The immediate causes of the War of 1812 were a series of economic sanctions taken by the British and French against the US as part of the Napoleonic Wars and American outrage at the British practice of impressment, especially after the Chesapeake incident of 1807.
Consequences: A large British army under Sir George Prevost was thus forced to abandon its invasion of the U.S. northeast and retreat to Canada. The American victory on Lake Champlain led to the conclusion of U.S.-British peace negotiations in Belgium, and on December 24, 1814, the Treaty of Ghent was signed, ending the war.