Question: what were the two sides of the war of 1812

title: War of 1812
text: From the outbreak of war with Napoleonic France , Britain had enforced a naval blockade to choke off neutral trade to France , which the US contested as illegal under international law . To man the blockade , Britain impressed American merchant sailors into the Royal Navy . Incidents such as the Chesapeake -- Leopard affair inflamed anti-British sentiment in the US . In 1811 , the British were in turn outraged by the Little Belt affair , in which 11 British sailors died . Britain supplied Indians who raided American settlers on the frontier , which hindered American expansion and provoked resentment . Historians debate whether the desire to annex some or all of British North America contributed to the American decision to go to war . On June 18 , 1812 , US President James Madison , after heavy pressure from the War Hawks in Congress , signed the American declaration of war into law . 

Answer: answer: Britain and America were two sides of the war of 1812.