This document summarizes the political and military events leading up to the War of 1812 between the United States and Britain. It describes how Napoleon's blockade of Europe and Britain's retaliation through impressment of American sailors increased tensions. The Chesapeake incident further inflamed the situation. Jefferson responded with economic embargoes that hurt the U.S. more than other countries. Meanwhile, Tecumseh united tribes in the Midwest against American expansion, culminating in a battle at Tippecanoe. Pro-war factions in Congress gained influence and called for action against Britain and its support of Native American resistance.