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Louisiana Purchase
The U.S. acquired approximately 828,000 square miles from France, significantly expanding its territory. This purchase provided the land necessary for future settlement and exploration, making westward expansion not only possible but highly desirable. -
Lewis and Clark Expedition
Following the Louisiana Purchase, Meriwether Lewis and William Clark explored the newly acquired land, mapping the region and establishing relations with Native American tribes. Their journey sparked interest in the West and highlighted its resources, demonstrating that expansion was not just feasible but also beneficial. -
The War of 1812
The War of 1812 was a conflict between the United States and Britain in order to assert its independence and control over North American territories. This event led to increased national unity and intensified nationalistic feelings and the desire for more land, reinforcing the belief that expansion was a natural progression for the young nation. -
Adams-Onís Treaty
This treaty between the U.S. and Spain resulted in the cession of Florida to the U.S. and established a clear boundary between U.S. and Spanish territories. This is significant as it secured more land and stabilized borders. The treaty further supported the idea that America was destined to expand its territory. -
American Migration
As new land was acquired, many routes helped facilitate the migration of thousands of settlers to the newly acquired Oregon Territory, promoting settlement and development. The Oregon Trail represented the practical application of the desire for expansion, as families ventured westward in search of new opportunities. -
Texas Revolution and Annexation
The Texas Revolution began in 1835 when American settlers in Texas revolted against Mexican rule. Texas declared independence in 1836 and became a republic, but the desire for annexation by the United States grew. In 1845, Texas was annexed. The annexation of Texas exemplified the belief in manifest destiny and the idea that Americans were destined to expand across the continent. -
The Mexican-American
The Mexican-American War was driven by the U.S. desire to acquire territories in the West, resulting in significant land gains following the Treaty of Guadalupe Hidalgo. This war exemplified the aggressive pursuit of territorial expansion and reinforced the notion that it was inevitable for the U.S. to grow.