War and rumors of war kept Presidio at a fever heat. We all knew that sooner or later the Constitutionalist army would come overland from Chihuahua and attack Ojinaga. In fact, the major in command of the Border Patrol had already been approached by the Federal generals in a body to make arrangements for the retreat of the Federal army from Ojinaga under such circumstances. They said that when the rebels attacked they would want to resist for a respectable length of time,—say two hours,—and that then they would like permission to come across the river. We knew that some twenty-five miles southward, at La Mula Pass, five hundred rebel volunteers guarded the only road from Ojinaga through the mountains. One day a courier sneaked through the Federal lines and across the river with important news. He said that the military band of the Federal army had been marching around the country practicing their music, and had been captured by the Constitutionalists, who stood them up in the market-place with rifles pointed at their heads, and made them play twelve hours at a stretch. "Thus," continued the message, "the hardships of life in the desert have been somewhat alleviated." We could never discover just how it was that the band happened to be practicing all alone twenty-two miles from Ojinaga in the desert. For a month longer the Federals remained at Ojinaga, and Presidio throve. Then Villa, at the head of his army, appeared over a rise of the desert. The Federals resisted a respectable length of time—just two hours, or, to be exact, until Villa himself at the head of a battery galloped right up to the muzzles of the guns,—and then poured across the river in wild rout, were herded in a vast corral by the American soldiers, and afterward imprisoned in a barbed-wire stockade at Fort Bliss, Texas. But by that time I was already far down in Mexico, riding across the desert with a hundred ragged Constitutionalist troopers on my way to the front. *PART ONE* *DESERT WAR* *CHAPTER I* *URBINA’S COUNTRY*