There were several arguments that were made for going to war with Great Britain in 1812. First there were those who hoped to gain new territory from a war with Britain. They felt the U.S. could acquire Canada, and its lucrative fur trade, through a war with Britain. In addition, some hoped to gain Spanish Florida in a war with Britain because Spain was allied with Britain.
1) British begin to impress American sailors and force them to work on British Ships. 2) James Madison delivers a report regarding British interference and impressment of sailors.