The Eastern Band of Cherokee Indians (EBCI), is a federally recognized Indian tribe based in western North Carolina in the United States. They are descended from the small group of 800–1,000 Cherokees who remained in the Eastern United States after the U.S. military, under the Indian Removal Act, moved the other 15,000 Cherokees to west of the Mississippi River in the late 1830s, to Indian Territory. Those Cherokees remaining in the east were to give up tribal Cherokee citizenship and to assimilate. They became U.S. citizens.