Answer:
The War of 1812 was declared by the United States Congress to Britain on June 18 of that year, highlighting some conflicts that were not resolved by the war of independence, which took place two decades earlier.
Some of the causes were: Trade restrictions imposed during the war in Great Britain and France, dominated by Napoleon Bonaparte; the imprisonment of US merchant sailors at the hands of the British Navy, and the alliances of the British with indigenous tribes during the expansion of the Americans through indigenous territories and into Canada.