A.
The U.S., Great Britain, and France were all claiming ownership of the land that is currently Canada.
B.
The United States had refused to pay its war debts from the American Revolution.
C.
Many of the European countries were still collecting illegal taxes from American businesses.
D.
The British were seizing American sailors and making them serve in the British Navy.
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.