1.) Great Britain had violated American sovereignty by refusing to surrender western forts as promised in the Treaty of Paris after the Revolutionary War.
2.) Great Britain began stopping American sea vessels and forcing subjects on the vessels into the British military. This practice was called “impressment.” The British justified the practice with the idea that American soldiers, once subjects of the King, were always subjects of the King.
3.) Great Britain issued a series of trade restrictions designed to disrupt American trade with France.
4.) Great Britain provided arms and support to Native Americans in the western frontiers who were attacking American settlers.
5.) Great Britain controlled much of Canada and many Americans simply wanted to expel the British from the North American continent and expand America’s borders.