
Westward Expansion
Westward Expansion refers to the period in 19th-century America when settlers moved westward across the continent. Motivated by the promise of land, resources, and opportunities, this movement was fueled by the belief in Manifest Destiny—the idea that Americans were destined to expand across North America. The era saw the acquisition of vast territories, such as through the Louisiana Purchase and the annexation of Texas, but it also led to conflicts with Native American tribes and other nations. This expansion fundamentally shaped the nation's demographics, economy, and culture, establishing the United States as a continental power.