The War of 1812 was a conflict fought between the United States and Great Britain from 1812 to 1815. The war was fought on land in North America and at sea. It was the result of a long-standing dispute between the two countries over issues such as maritime rights, trade
From Wikipedia
The War of 1812 was a conflict initiated by the United States against the 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.