Pershing's Folly: US Army Operations in Mexico, 1916 covers the US invasion of Mexico to hunt down and kill Pancho Villa and his army. This ended up a fiasco because of Mexican army and Villista's opposing the US troops deep penetration. The Americans entered blind and relied on informants to provide whereabouts of Pancho Villa and his 1500 man army. Added to this was the suspicion that a German unit might be present instigating unrest. —description from the publisher