African Americans, also known as Afro-Americans or Black Americans, are an ethnic group consisting of Americans with partial or total ancestry from any of the Black racial groups of Africa. African Americans constitute the third largest racial or ethnic group in the U.S. after White Americans and Hispanic and Latino Americans. Most African Americans are descendants of enslaved people, having West African and coastal Central African ancestry, with varying amounts of Western European and Native American ancestry. This ambrotype depicts African American Union soldier Sgt. Samuel Smith, of the 119th United States Colored Troops, with his family in c. 1863–65.Ambrotype credit: unattributed photographer