The Yuchi, also spelled Euchee and Uchee, are people of a Native American tribe who traditionally lived in the eastern Tennessee River valley in Tennessee in the 16th century. The Yuchi were well known mound builders. During the 17th century, they moved south to Alabama, Georgia and South Carolina. After suffering many fatalities due to epidemic disease and warfare in the 18th century, several surviving Yuchi were removed to Indian Territory in the 1830s, together with their allies the Muscogee Creek. (Some who remained in the South were classified as "free persons of color"; others were enslaved.) Some remnant groups migrated to Florida, where they became part of the recently formed Seminole Tribe of Florida.