The 1916 attack on Columbus, New Mexico, by Pancho Villa caused the U.S. to send troops over the border under the command of Major General John J. Pershing, (Cullum 3126). Known as the Mexican Expedition this action was billed as an action to capture or kill Villa and his men, not as support for any of the factions. The action succeeded in reducing the attacks but did not capture or kill Pancho Villa himself.
U.S. entry