After the Lousiana Purchase what Formed Our Eastern And Western Boundaries
http://www.gatewayno.com/history/images/la-purchase-large.jpg
After the Louisiana Purchase, the eastern and western boundaries of the United States were formed by a combination of treaties, negotiations, and territorial acquisitions.
To determine the eastern boundary, the United States and Britain negotiated the Treaty of 1818. This treaty settled several territorial disputes between the two countries and established the 49th parallel as the border between British North America (present-day Canada) and the United States. This boundary stretched from the Lake of the Woods in present-day Minnesota to the Rocky Mountains.
The western boundary of the United States was formed through a series of acquisitions and treaties throughout the 19th century. Following the Louisiana Purchase in 1803, which expanded the western boundary of the United States, the country continued to acquire additional territory. For example, the Adams-Onís Treaty of 1819 between the United States and Spain defined the western boundary of the Louisiana Purchase, including present-day Florida.
Further westward expansion occurred through treaties and acquisitions such as the Treaty of Guadalupe Hidalgo in 1848, which ended the Mexican-American War and established the Rio Grande as the border between the United States and Mexico. The Oregon Treaty of 1846 resolved a territorial dispute with Britain and established the 49th parallel as the western border of the United States from the Rocky Mountains to the Pacific Ocean.
In summary, the eastern boundary of the United States after the Louisiana Purchase was determined through the Treaty of 1818 with Britain, while the western boundary was formed through a combination of acquisitions and treaties, including the Adams-Onís Treaty and the Oregon Treaty.