"The scene: U.S. troops carry on hostilities to "liberate" a nation. As the confrontation wears on, the public (and finally the American soldiers themselves) come to doubt both the U.S.'s aims and its ability to win. Ultimately, the troops are recalled; when peace is declared, it is evident that in terms of resources and human lives, the U.S. was defeated. Vietnam? Iraq? How about Canada! Contrary to popular notions of U.S. history, the Vietnam War was not the first war that the U.S. lost (or perhaps more accurately, failed to win). That distinction belongs to the War of 1812, a war fairly unfamiliar to most U.S. citizens today, and one which in its day was as controversial as the Vietnam War was in its time.
Our grade-school history books claim that the main cause of the war was that U.S. ships trading with Napoleonic France were being hassled by the British. This activity did occur, for Britain was at war with Napoleon at the time, and U.S. commerce was aiding France at the time. However, the British repealed the orders to search U.S. ships a day before the U.S. declared war. Granted, communication was slow at the time, and the U.S. did not learn of the fact until five weeks later. But why, if this was the case, did the U.S. remain at war for two and a half years? A desire to expand beyond the Appalachian Mountains was one of the primary reasons for going to war against Britain in 1776 (Britain had declared that no settlers could legally penetrate this barrier), and the country's desire to expand was invoked as justification for wars against Canada, Mexico, Florida and the native Americans throughout the country's early history. In 1812, the U.S. attempted to take over Canada, which was still in British hands at the time. Britain would likely have defeated the U.S. swiftly had had they not also been involved in war in Europe.
American Dissent
The War of 1812 was very unpopular at home. Many Americans sympathized with Britain in its war against Napoleon. The Declaration of War against Britain, on 18 June 1812, passed 79-49 in the House and 19-13 in the Senate. Only 3 of New York's 14 representatives voted for war. Of 50,000 slots authorized in the U.S. Army, only 10,000 volunteers came forth.
Anti-war sentiment ran highest in New England, led by the Federalist Party. Perkins (see further reading below) notes that upon declaration of war, "In many New England seaports church bells tolled a dirge, shops closed, and ships' flags flew at half-mast. Bostonians hissed two prowar congressmen, and another was mobbed at Plymouth." Massachusetts Governor Caleb Strong even attempted secret negotiations with Britain with a plan (supported by Federalists) for New England to secede from the Union!…"
More here
lutins.org/1812.html
Amicalement
Armand