''The Convention of 1818 set the western boundary between the United States and British North America (later Canada) at the forty-ninth parallel up to the Rocky Mountains. Both agreements reflected the easing of diplomatic tensions that had led to the War of 1812 and marked the beginning of Anglo-American cooperation.'' Put the commas i got this from google put the comas
The large states holding vast amounts of western land ceded the land to the government under the Articles so that all the states could share in the wealth of those lands.
