The War of 1812 between the United States and Great Britain witnessed several American attempts to invade and conquer Canada. The three-point planned invasion of Canada by the U.S. involved three main routes:

1. Detroit-Windsor Corridor: The U.S. planned to invade Upper Canada (present-day Ontario) by crossing the Detroit River. However, this plan was thwarted when British and Native American forces, under the leadership of Major General Isaac Brock and Shawnee leader Tecumseh, defeated American troops and captured Detroit.
2. Niagara Peninsula: Another crucial entry point was the Niagara Peninsula. American forces aimed to cross the Niagara River and control the region. While there were skirmishes and battles, including the famous Battle of Queenston Heights, the U.S. couldn't establish a firm foothold.
3. Lake Champlain and Montreal: The third invasion route was from the northeast, targeting Montreal through the Lake Champlain route. This invasion attempt also met with limited success, as the British managed to repulse American advances.