 After the Conquest, land here was redistributed among the conquering Spanish; however, starting in 1537 indigenous leaders began to struggle to regain the lost lands and water rights, a fight that has continued for over 400 years to the beginning of the ejido reform.In the cases of Ejido San Miguel Hila and Ejido Los Comuneros, the issues are still not resolved.In 1820, the municipality of Monte Bajo was created, which included what is now Nicolás Romero and parts of Atizapán de Zaragoza.