الجيش المكسيكي
In June 1916, Gen. Pershing was informed that Pancho Villa could be taken at Carrizal, west of Ahumada. When he sent Captains Boyd and Morey to investigate with C and K troops of the 10th Cavalry, they were confronted by Mexican Army troops, not Villa's men. The Mexican army was ordered by Venustiano Carranza to fire upon any American soldier moving any direction but north. The Americans were issued a warning by the Mexican army. Boyd ordered the men to attack anyway. In the resulting battle, the American attack was repelled.