Ruse de guerre
Defined in 2 dictionaries — Case Law, Black's (1910)
Definitions from Case Law
From 15 U.S. 345 - The Eleanor · 1817Most cited · 10 citing opinions
to assume the guise of a friend or an enemy, is, in legitimate warfare, an act the most familiar and frequent in its occurrence. It is so ordinary a ruse de guerre, that it ought rather to be expected than the display of real colours.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Fr. A trick in war; a stratagem.