The main cause of the War of 1812 was British interference with American shipping.

Tensions had escalated due to British naval practices, including the impressment of American sailors and restrictions on American trade with France during the Napoleonic Wars. Additionally, the U.S. sought to assert its rights as a sovereign nation and protect its maritime interests. Other contributing factors included conflicts with Native Americans and the desire for territorial expansion, but the primary catalyst was the British interference that prompted calls for war among American leaders and the public.