What were the official boundaries of Native American territory after 1783?

After 1783, the official boundaries of Native American territory were not clearly defined, as the U.S. government and European settlers increasingly encroached on indigenous lands. The Treaty of Paris in 1783 recognized U.S. sovereignty over territories east of the Mississippi River, but it did not grant rights to Native American lands, leading to conflicts and dispossession. Various treaties were made with Native tribes, often under duress, but many were later violated or ignored by the U.S. government, resulting in significant loss of territory for Native Americans throughout the 19th century.