Historians of U.S.-Mexican relations are confronted by a conundrum in the Punitive Expedition of 1916–1917. Ostensibly motivated by the attack of General Francisco ‘Pancho’ Villa upon Columbus, New Mexico on March 9, 1916, the expedition traditionally has been evaluated in terms of its supposed mission. The puzzle lies in the fact that President Woodrow Wilson publicly told the American and Mexican people one thing and privately told his field commander, John J. Pershing, quite another. Wilson's press release on the morning of March 10, 1916 announced: ‘An adequate force will be sent at once in pursuit of Villa with the single object of capturing him and putting a stop to his forays’.