Answer:
The Royal Navy also outraged Americans by its practice of impressment, or removing seamen from U.S. merchant vessels and forcing them to serve on behalf of the British
Britain relied on a maritime economic blockade to defeat France. When American merchants tried to exploit their neutral status to breach this blockade, the British introduced new laws, the 'Orders in Council', to block this trading. ... Britain was in a total war with France.
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 practice of impressment, especially after the Chesapeake incident of 1807.