The War of 1812, fought between the U.S. and Great Britain, is considered the war that confirms that the U.S. is independent of Britain.

The three main causes of the war are the disruption of the American shipping trade, the related impressment of American sailors, and the British support of Native Americans.

And also the impressment policy angered the Americans who were tired of the British attacking its ships and taking its cargo and sailors.

The third cause of the war was the belief that the British were encouraging the Natives to fight against the American frontier settlement. Before the U.S. declared war, the British involvement led to a battle called Tippecanoe.