A Ponca tribe chief whose landmark lawsuit in 1879 established that a Native American is a person under the law was honored Friday with the unveiling of a U.S. Postal Service stamp that features his portrait.

The release of the stamp of Chief Standing Bear comes 146 years after the Army forced him and about 700 other members of the Ponca tribe to leave their homeland in northeast Nebraska and walk 600 miles (965 kilometers) to the Indian Territory in Oklahoma. Chief Standing Bear was arrested and imprisoned in Fort Omaha when he and others tried to return. This prompted him to file a lawsuit t...