How Did The Louisiana Purchase And The Adams Onis Treaty...

1. How did the Louisiana Purchase and the Adams-Onis Treaty affect the boundaries of the U.S.? The Louisiana Purchase affected the boundaries of the U.S. because when Jefferson bought the land, the boundaries were not clear. Spain claimed the border was about one hundred miles west of the Mississippi River, while Jefferson was under the impression that it was around eight hundred miles further west, which was defined by the crest of the Rocky Mountains. This lead to four different government-funded expeditions. The first was in 1804 when Lewis and Clark led an expedition westward to determine the upper reaches of the Missouri River. Throughout the expedition Lewis and Clark were instructed to study the Indian culture, such as plants and animals. They were able to explore the Indian culture when they stayed their first winter in huts beside the Mandan Indians. Without the help from the Indians they would not have survived the winter. They also had to draw out the geography of the West . After the treacherous journey, they reached the Pacific Ocean on November 7, 1805. They made their journey back to St. Louis and arrived back in September 1806. The other three expeditions that took place between 1804 and 1806 were to determine the southwestern border. The first group went down the Red River to the Ouachita River, ending in current-day Arkansas. The second group went west into eastern Texas along the Red River and the third group ended up going too far into the Spaniard’sShow MoreRelatedThe Louisiana Purchase Affected The Boundaries Of The United States1713 Words   |  7 PagesThe Louisiana Purchase affected the boundaries of the U.S. because when Jefferson bought the land, the boundaries were not clear. Spain claimed the border was about one hundred miles west of the Mississippi River, while Jefferson was under the impression that it was around eight hundred miles further west, which was defined by the crest of the Rocky Mountains. This lead to four diff erent government-funded expeditions. The first was in 1804 when Lewis and Clark led an expedition westward to determine