09/08/1858
https://www.nps.gov...
"The Government of the United States will give the same protection to all its soldiers, and if the enemy shall sell or enslave anyone because of his color the offense shall be punished by retaliation u..."
"To sell or enslave any captured person on account of his color, and for no offense against the laws of war, is a relapse into barbarism and a crime against the civilization of the age."
"The law of nations and the usages and customs of war, as carried on by civilized powers, permit no distinction as to color in the treatment of prisoners of war as public enemies."
"It is therefore ordered, That for every soldier of the United States killed in violation of the laws of war a rebel soldier shall be executed, and for every one enslaved by the enemy or sold into slav..."