“Where are my guns?” demanded Pancho Villa, flamboyant bandit-warrior of the Mexican revolution. Though he had paid for them, the store across the U.S. border in the town of Columbus, New Mexico hadn’t delivered. He had other grievances as well. So in the early morning of March 9, 1916, Villa led some 500 troops in an attack on Columbus that lasted until dawn, without doing too much damage. Next day, General John J. Pershing, of World War I fame, accompanied by George Patton, hero of World War II, arrived to drive out the Villistas and pursue their leader into Mexico. They didn’t catch him. He was eventually assassinated by other Mexicans in some kind of political intrigue.