The Mexican Punitive Expedition was the last time that horse-mounted troops would play a significant role in an American military operation. The army was already replacing their old reliable steeds and mules with trucks and automobiles.
The troops were often in the saddle for over seventeen hours a day, riding through rough, irregular terrain in pursuit of Villa. The 10th Cavalry took part in several tactical actions. Near Aguas Calientes, Major Young, now a Squadron Commander, led his troops in an attack on about 150 Villistas, who retreated with the Buffalo Soldiers in pursuit.
At El Mesteno, the opposing forces could not be dislodged by rifle fire. Colonel Brown ordered Major Young to mount up and charge the enemy flank. Young's men dropped back from the firing line, ran to their horses, and mounted up to form a line with pistols drawn. At Major Young's signal, they moved forward at a gallop, threatening to envelop the Villistas' right flank. The troopers didn't fire a shot, but they did start moving faster and yelling. The Villistas refused to meet the charge, ceased firing, and disappeared into the woods.
A month later at Hacienda Santa Cruz, Major Young led his squadron to the relief of 13th Cavalry troops, who were in danger of being wiped out. Young's reinforcement prevented a disastrous defeat for these American troops.