From The General and the Jaguar: Pershing’s Hunt for Pancho Villa: A True Story of Revolution and Revenge, by Eileen Welsome (Little, Brown, 2009), Kindle pp. 64-65:
Villa left the civilized comforts of Juárez and began the arduous march across the Sierra Madre. It took his men twenty-five days to get through the mountains with their horses, forty-two cannons, and pack mules. Men and horses perished when they lost their footing on the narrow passes and plunged headlong into the deep canyons. Especially treacherous was the Cañón del Púlpito, a name taken from a towering rock shaped like a church pulpit.
When the Villistas had exited the mountains and were toiling toward Agua Prieta, Villa learned that President Wilson had recognized Venustiano Carranza as the de facto leader of Mexico. To Villa, who had professed himself a friend of the Americans early on, Wilson’s decision was an unthinkable betrayal.
FOR WILSON, the decision had as much to do with the deteriorating geopolitical conditions as it did with Villa. In Berlin, the German high command had continued to watch with interest the tension between the United States and Mexico, hoping against hope that war might break out between the two countries. Such a conflict, they theorized, would slow the U.S. supplies going to Great Britain and discourage the United States from entering the European war. An even more delicious scenario involved manipulating Japan, which had allied itself with Great Britain, into joining Mexico in a war against the United States, thereby diverting resources from that potential enemy as well.
The Germans had hoped to use Victoriano Huerta as their catalyst and had offered to supply him with arms and money to return to Mexico, regain control of the country, and attack the United States. Huerta accepted the German offer and arrived in New York City on April 13, 1915, almost a year to the day after the Veracruz invasion. Two months later, he boarded a train for the border and was arrested a few miles west of El Paso. By then, Huerta was extremely ill from cirrhosis of the liver, and was eventually allowed to spend his remaining days with family members, who were now living in El Paso. He died on January 13, 1916, his bed facing his convulsed country and his parlor filled with old generals who wept openly and smoked corn-husk cigarettes. Thousands attended his funeral, where he lay in a coffin covered with flowers, wearing his full-dress uniform. Worried about further German attempts to destabilize Mexico, the United States decided to recognize the bellicose Carranza. The War Department’s chief of staff, Hugh Scott, had gotten wind of the administration’s plan and did everything he could to stop it. “The recognition of Carranza had the effect of solidifying the power of the man who had rewarded us with kicks on every occasion and of making an outlaw of the man who had helped us.” But the American decision was a pragmatic one. Carranza had the upper hand, Villa’s fortunes were in decline, and stability in Mexico mattered most.
The United States had even gone beyond simply recognizing Carranza as Mexico’s legitimate leader. The government allowed Carranza’s troops to travel by train through the border states of Texas, New Mexico, and Arizona to reinforce Agua Prieta. On the thirty-first of October, as the yellow plume of dust signaling the advance guard of Villa’s army appeared on the horizon, three infantry brigades consisting of five thousand Carrancistas arrived in the little town.