[1][2] Initiated after the World War II on Mexican Army held a number of amendments to a view of turning it into a modern armed force, among the series of actions to implement the strategic plans in order to minimize consequences of different actions that put at risk the national security were the most important.

III on September 18, 1965, which introduced Annex E - the Title of Plan to Aid Civilian Disasters known by its initials DN-III-E, nicknamed "DN-Three-E." The floods on the Pánuco River in 1966 led to the first Plan DN-III-E operation to rescue and provide relief to affected residents of the states of Veracruz and Tamaulipas, the nickname of the plan would later be the name of the measures that would prove to be a great success among the Mexican people as the Secretariat of National Defense would, every time a natural or man-made calamity strike the country, mount operations to assist the people in these trying times of disaster, a tradition that continues to this day.

As of September 19, 2017, as a direct result of the 2017 Chiapas earthquake, Plan DN-III-E is in place within the affected areas within southern Mexico, and Army and Air Force units have been deployed to implement the program.

They have also been deployed to central Mexico as a result of the September 19, 2017 earthquake to provide disaster relief and support for the victims of this calamity.

[3] During such disasters like the hurricane season, earthquakes, flooding, wildfires and landsides and if during major man-made calamities the Secretariat deploys 4 Disaster Engineer Brigades (AICD), which are assigned in the cities of Guadalajara, Monterrey, Mérida, and Mexico City, with similar equipment, consisting of heavy and light vehicles, rescue equipment, community kitchens and specialized personnel.