What was the key factor driving the expansion of the United States in the 19th century? 🔊
The expansion of the United States in the 19th century was primarily driven by the concept of Manifest Destiny, the belief that Americans were divinely ordained to expand across the continent. This ideology fueled westward migration and justified the annexation of vast territories. Acquiring land through means such as the Louisiana Purchase, military conflicts (like the Mexican-American War), and treaties spurred economic opportunities and the spread of American democracy. The desire for agricultural land, coupled with advancement in transportation technologies such as the railroad, facilitated the movement of settlers and solidified the nation's growth. However, this expansion also led to significant conflict over issues such as slavery.


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