5. What agreement set the official border of the Louisiana Territory between Canada and the United States?

Please help me answer this question.

I'm not sure, but I think this is the one you want.

http://en.wikipedia.org/wiki/Oregon_Treaty

Check your book to be sure.

The agreement that set the official border of the Louisiana Territory between Canada and the United States is known as the Treaty of 1818. To find this answer, you can follow these steps:

1. Start by understanding the historical context of the Louisiana Territory. The Louisiana Territory was a large region in North America that was initially owned by France. Through the Louisiana Purchase in 1803, the United States acquired this territory from France.

2. Next, identify the countries in question, which are Canada (formerly a British territory) and the United States.

3. Search for key treaties or agreements that were signed to establish borders between Canada and the United States in the relevant timeframe. The period when the Louisiana Territory was being settled and its borders established is the early 19th century.

4. Based on the historical context and timeframe, you will come across the Treaty of 1818. This treaty was signed between the United States and Great Britain (which administered Canada) on October 20, 1818.

5. In the Treaty of 1818, the United States and Great Britain agreed to define the boundary between their territories. This agreement set the border of the Louisiana Territory between Canada and the United States, extending from the Lake of the Woods in present-day Minnesota to the Rocky Mountains.

By following these steps, you can discover that the Treaty of 1818 set the official border of the Louisiana Territory between Canada and the United States.