manifest destiny was used as a justification for the us annexation of
Manifest destiny Newspaper editor John O'Sullivan is generally credited with coining the term manifest destiny in 1845 to describe the essence of this mindset, which was a rhetorical tone;[6] however, the unsigned editorial titled "Annexation" in which it first appeared was arguably written by journalist and annexation advocate Jane Cazneau.[7] The term was used by Democrats in the 1840s to justify the war with Mexico and it was also used to divide half of Oregon with the United Kingdom. But manifest destiny always limped along because of its internal limitations and the issue of slavery, says Merk. It never became a national priority. By 1843 John Quincy Adams, originally a major supporter of the concept underlying manifest destiny, had changed his mind and repudiated expansionism because it meant the expansion of slavery in Texas.[8]
Origins of the War of 1812 There were several immediate stated causes for the U.S. declaration of war: First, a series of trade restrictions introduced by Britain to impede American trade with France, a country with which Britain was at war (the U.S. contested these restrictions as illegal under international law);[2] second, the impressment (forced recruitment) of U.S. seamen into the Royal Navy; third, the British military support for American Indians who were offering armed resistance to the expansion of the American frontier to the Northwest; fourth, a possible desire on the part of the United States to annex Canada.[3] An implicit but powerful motivation for the Americans was the desire to uphold national honor in the face of what they considered to be British insults (such as the Chesapeake affair).[4]