Ruse de guerre
Also found in: Dictionary, Wikipedia.
RUSE DE GUERRE. Literally a trick in war; a stratagem. It is said to be lawful among belligerents, provided it does not involve treachery and falsehood. Grot. Droit de la Guerre, liv. 3, c. 1, Sec. 9.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.