The Bureau of Indian Affairs (BIA) is a U.S. government agency responsible for the administration and management of relations with Native American tribes. It plays a critical role in overseeing programs related to tribal governance, education, healthcare, and land management. Established in the early 19th century, the BIA's policies have significantly influenced the rights and welfare of Native Americans, particularly through legislation such as the Indian Citizenship Act, the Indian Relocation Act, and processes related to tribal recognition.