What were the two reasons fr the war of 1812

There were several 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) second, the impressment (forced recruitment) of seamen on U. S. vessels into the Royal Navy (the British claimed they were British deserters); 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. 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).