Summary

Portrait of Francis Lieber Francis Lieber Instructions for the Government of Armies of the United States in the Field (1898)

The law of war does not allow proclaiming either an individual belonging to the hostile army, or a citizen, or a subject of the hostile government, an outlaw, who may be slain without trial by any captor, any more than the modern law of peace allows such intentional outlawry; on the contrary, it abhors such outrage. The sternest retaliation should follow the murder committed in consequence of such proclamation, made by whatever authority. Civilized nations look with horror upon offers of rewards for the assassination of enemies as relapses into barbarism.
Source: Wikisource

Portrait of Francis Lieber Francis Lieber Instructions for the Government of Armies of the United States in the Field (1898)

Therefore, in a war between the United States and a belligerent which admits of slavery, if a per­son held in bondage by that belligerent be captured by or come as a fugitive under the protection of the military forces of the United States, such person is immediately entitled to the rights and privileges of a freeman. To return such person into slavery would amount to enslaving a free person, and neither the United States nor any officer under their authority can enslave any human being.
Source: Wikisource

Portrait of Francis Lieber Francis Lieber Instructions for the Government of Armies of the United States in the Field (1898)

When humanity induces the adoption of the rules of regular war toward rebels, whether the adoption is partial or entire, it does in no way whatever imply a partial or complete acknowledgment of their government, if they have set up one, or of them, as an independent and sovereign power. Neutrals have no right to make the adoption of the rules of war by the assailed government toward rebels the ground of their own acknowledgment of the revolted people as an independent power.
Source: Wikisource

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