A Pancho Villa Constitutionalist Army artillery position - the man in the middle, directing fire, is an American soldier of fortune

Villa poses with his artillerymen next to one of his field pieces

Adolpho Fierro poses with Pancho Villa's artilleymen - probably in the vicinity of Torreon

Villa's artillery massed outside of Torreon before the assault of the city

Villa's artillery in 1914

Villa's artillery in position to fire on Torreon - the turned up fronts on the hats was Villa's method of identifying his troops, since many of the irregulars did not wear uniforms