Adelbert Ames was an American sailor, soldier, businessman and politician who served with distinction as a Union Army general during the American Civil War. A Radical Republican, he was military governor, U.S. Senator, and civilian governor in Reconstruction-era Mississippi. In 1898, he served as a United States Army general during the Spanish–American War. He was the last Republican to serve as the state governor of Mississippi until the election of Kirk Fordice, who took office in January 1992, 116 years after Ames vacated the office.

The Radical Republicans were a faction within the Republican Party originating from the party's founding in 1854—some six years before the Civil War—until the Compromise of 1877, which effectively ended Reconstruction. They called themselves "Radicals" because of their goal of immediate, complete, and permanent eradication of slavery in the United States. They were opposed during the war by the Moderate Republicans, and by the Democratic Party. Radicals led efforts after the war to establish civil rights for former slaves and fully implement emancipation. After unsuccessful measures in 1866 resulted in violence against former slaves in the rebel states, Radicals pushed the Fourteenth Amendment for statutory protections through Congress. They opposed allowing ex-Confederate officers to retake political power in the Southern U.S., and emphasized equality, civil rights and voting rights for the "freedmen", i.e., former slaves who had been freed during or after the Civil War by the Emancipation Proclamation and the Thirteenth Amendment.