United States against Villa, Zapata and Maytorena

What has been called the civil war between Villa, Zapata, Maytorena and Carranza was actually the interference of the United States of America to favor Carranza with arms, money and men.It is a reality that Carranza received arms from the US through the ports of Tampico and Veracruz and that the Mexican troops were trained by American officers. Carranza had a surplus of arms and a lack of men and Villa, Zapata and Maytorena had a surplus of men and a lack of arms.In Sonora three Divisions of the North American army invaded the country directly to attack Villa, inflicting on him a defeat that would mark the end of the Northern Division.