Manifest Destiny, a concept from the 1800s, was used to support America’s growth into the Americas. It was based on the belief in culture and institutions being superior and claimed a right from a power to spread these values across North America. This ideology greatly impacted U.S. Policies and had effects on indigenous communities. Expansion-focused actions such as the Louisiana Purchase in 1803, the addition of Texas in 1845, westward migration along the Oregon Trail, and territorial gains from the Mexican American War between 1846 and 1848 were driven by this ideology. The Indian Removal Act of 1830 forced Native Americans along the Trail of Tears due to pressure for expansion. The Homestead Act of 1862 encouraged migration westward by providing land to settlers at the expense of American communities. Supporters of Manifest Destiny used necessity and divine approval as justifications for ambitions fueling a desire for growth. American reactions to U.S. Expansion efforts ranged from negotiations to armed opposition. Many tribal groups tried to make agreements to safeguard their territories and independence, but the U.S. Government often failed to uphold these agreements. The Dawes Act of 1887 further disrupted society by promoting the assimilation of Native Americans into American culture, dividing lands among members and eroding traditional communal land ownership practices. Manifest Destiny drove pioneers to move, resulting in conditions for Native Americans who were displaced from their homelands. The desire for expansion prompted settlers to exert control over Native Americans, even though they viewed themselves as nations. Slavery was also a factor during this period, as the establishment of settlements brought about conditions for individuals. Native Americans had limited means to resist expansion, and the pursuit of opportunities drove expansion further, making it impossible for them to hold onto their lands. The forced removal of Native Americans from their ancestral lands led to devastating consequences, including loss of culture, livelihood, and even lives. The legacy of this period continues to impact Native American communities today, as they fight for recognition, justice, and sovereignty over their lands.