The historical event characterized by the displacement of Native Americans during westward expansion is known as the Trail of Tears, which resulted from the government-mandated Indian Removal Act of 1830. This policy led to the forced relocation of thousands of Native Americans from their ancestral lands, primarily in the southeastern United States, to designated Indian Territory in present-day Oklahoma. The journey was marked by suffering, disease, and high mortality rates, fundamentally altering the cultural landscape and livelihood of Native American tribes. The event serves as a poignant reminder of the injustices associated with America’s expansionist policies.