Plan DN-III-E

Plan DN-III-E is Mexico's standing framework for providing emergency assistance to civilians affected, or potentially threatened, by disasters. It is implemented principally by the Secretariat of National Defense (SEDENA) through the Mexican Army and Mexican Air Force, which organize personnel, transport, engineering, medical, security, rescue, and logistical capabilities for deployment during floods, earthquakes, hurricanes, wildfires, landslides, and other serious emergencies. The plan is not a commercial brand or a product line in the conventional sense; it is an operational doctrine and public-service capability whose name has become widely associated in Mexico with military disaster response. The plan originated within Mexico's postwar effort to modernize and systematize the armed forces' strategic planning. During the 1960s, army action plans were revised into defense plans administered by SEDENA. National Defence Plan No. III, established on September 18, 1965, included an Annex E devoted to assisting civilians during disasters. The designation DN-III-E, originally referring to that annex, subsequently became the public name for the broader disaster-relief measures carried out under it. Its first major operational test came during flooding along the Pánuco River in 1966, when military units rescued and assisted residents in Veracruz and Tamaulipas. Plan DN-III-E operates within Mexico's civil-protection system. Its legal and policy foundations include the Civil Protection Act, the National Development Plan, and the Organic Law of the Mexican Army and Air Force. SEDENA coordinates its military contribution with the National Civil Protection System, commonly known as SINAPROC, while working alongside civilian authorities, state and municipal governments, the Mexican Navy, health agencies, and other emergency organizations. The Mexican Navy maintains its own maritime and coastal disaster-response framework, Plan Marina, while the National Guard also participates in contemporary emergency operations. The plan's activities include search and rescue, evacuation of communities in danger, operation and support of shelters, distribution of food and supplies, medical assistance, public guidance, and security and surveillance in affected areas. Depending on the emergency, Army and Air Force assets can support ground rescue, helicopter evacuation, aerial reconnaissance, firefighting, water rescue, transportation, engineering work, debris removal, and the establishment of temporary facilities. Community kitchens, military hospitals and medical teams, canine units, specialized rescue personnel, vehicles, aircraft, and heavy engineering equipment are among the resources that can be brought together. A permanent Support Force for Disaster, known by its Spanish acronym FACD, was created within SEDENA on February 10, 2000. The formation combines land and air units, military engineers, health and supply services, military police, trained search-and-rescue personnel, and support from cadets in the final years of military academies and schools. Four Disaster Engineer Brigades are based in Guadalajara, Monterrey, Mérida, and Mexico City. These brigades maintain comparable rescue, transport, engineering, kitchen, and specialist capabilities so that forces can be deployed from different regions as conditions require. The Air Force component includes helicopters and transport aircraft, while ground formations provide evacuation, security, engineering, and relief distribution. The plan has been particularly visible after large earthquakes and during severe hurricane and flood seasons. Following the 1985 Mexico City earthquake, Mexico established the National Civil Protection System, helping formalize the relationship between military disaster assistance and the wider national emergency-management structure. On September 19, 2017, after major earthquakes in Chiapas and central Mexico, Army and Air Force units operating under Plan DN-III-E were deployed to affected communities. The plan continues to function as a scalable emergency capability rather than as a single fixed unit: its force composition and tasks vary according to the hazard, geographic area, and requirements established by civil authorities. Beginning in 2023, the Army Emergency Action Battalion was added to the FACD order of battle, expanding the permanent formation available for rapid response. Plan DN-III-E therefore represents both a historical military planning instrument and an enduring public institution in Mexico's disaster-response architecture. Its central positioning is rapid, organized, and highly visible assistance to civilians, using military command, transport, engineering, medical, and logistics capabilities in support of national civil protection.

Plan DN-III-E emerged from the Mexican Army's postwar effort to develop a more systematic set of strategic and operational plans. In the 1960s, Army action plans were revised into defense plans administered by the Secretariat of National Defense. National Defence Plan No. III was established on September 18, 1965. Its Annex E addressed assistance to civilians during disasters, creating the designation DN-III-E. Although the original title referred to an annex within a broader defense document, the name later came to describe the disaster-relief measures themselves. The plan received its first major operational test during the 1966 flooding of the Pánuco River. Military forces assisted communities in Veracruz and Tamaulipas by conducting rescue and relief work. The operation established a recurring model in which the armed forces could rapidly mobilize personnel, vehicles, medical support, engineering resources, food, and transport when a natural or human-caused emergency affected a large civilian population. The framework is grounded in Mexico's civil-protection legislation and national planning system, including the Civil Protection Act, the National Development Plan, and the Organic Law of the Mexican Army and Air Force. Plan DN-III-E is implemented by SEDENA and is coordinated with the National Civil Protection System, or SINAPROC. It consequently functions as one component of a broader national emergency structure rather than as an independent civilian agency. The Mexican Navy operates the related Plan Marina, particularly important in coastal and maritime areas, and the National Guard also forms part of the country's contemporary disaster-response capacity. The 1985 Mexico City earthquake was a major turning point in Mexican civil protection. In its aftermath, Mexico created the National Civil Protection System and further clarified the responsibilities of public institutions during disasters. SEDENA continued to provide military assistance through Plan DN-III-E, while other federal, state, and municipal bodies developed complementary roles. A permanent Support Force for Disaster, or FACD, was created by SEDENA on February 10, 2000. It brought together land and air units, military engineers, medical and health services, supply personnel, military police, canine teams, and search-and-rescue specialists. The formation can also draw on final-year cadets from military academies and schools, the Valley of Mexico Task Force, and designated light infantry brigades. Its air component includes helicopters and transport aircraft, allowing the plan to support communities isolated by floodwaters, damaged roads, or other access problems. Four Disaster Engineer Brigades based in Guadalajara, Monterrey, Mérida, and Mexico City provide geographically distributed response capacity. Their equipment includes heavy and light vehicles, rescue tools, field kitchens, and specialized personnel. During wildfires, helicopters can assist ground forces with firefighting equipment. During floods, Army and Air Force elements can undertake airborne and waterborne rescue, evacuation, reconnaissance, and supply missions. Medical teams, military police, and canine units provide additional support in collapsed structures, shelters, evacuation routes, and affected public spaces. Plan DN-III-E became particularly visible during the 2017 earthquakes. Following the September 2017 earthquake in Chiapas, and the September 19 earthquake affecting central Mexico, SEDENA deployed Army and Air Force units to conduct rescue, relief, and support operations. These deployments demonstrated the plan's ability to operate across multiple regions during a period of simultaneous national emergencies. The plan is organized around core actions that include search and rescue, evacuation of communities at risk, shelter management or support, recommendations and guidance for the public, and security and surveillance of affected areas. In practice, the scope can expand to include food preparation, humanitarian distribution, medical care, engineering, debris clearance, transportation, firefighting, and restoration of access. Beginning in 2023, the Army Emergency Action Battalion was added to the FACD order of battle. This development reinforced the permanent formation available for rapid intervention. Plan DN-III-E remains an active and adaptable component of Mexico's disaster-management system, with its exact personnel, equipment, and mission determined by the nature of each emergency and by coordination with civilian authorities.

• 2023

  Army Emergency Action Battalion added to FACD

  [1]Plan DN-III-Een.wikipedia.org

  The Army Emergency Action Battalion joined the Support Force for Disaster order of battle.

• 2017

  Response to the Chiapas and central Mexico earthquakes

  [1]Plan DN-III-Een.wikipedia.org

  Army and Air Force units deployed to multiple earthquake-affected regions under Plan DN-III-E.

• 2000

  Support Force for Disaster established

  [1]Plan DN-III-Een.wikipedia.org

  SEDENA created the permanent FACD formation to provide integrated land, air, engineering, medical, logistics, and rescue support.

• 1985

  Mexico creates the National Civil Protection System after the Mexico City earthquake

  [1]Plan DN-III-Een.wikipedia.org

  The earthquake helped drive the creation of a national civil-protection structure that formalized coordination among military and civilian disaster responders.

• 1966

  First reported operation during Pánuco River flooding

  [1]Plan DN-III-Een.wikipedia.org

  Military units used the plan to rescue and assist residents affected by flooding in Veracruz and Tamaulipas.

• 1965

  Annex E incorporated into National Defence Plan No. III

  [1]Plan DN-III-Een.wikipedia.org

  Mexico established National Defence Plan No. III with an Annex E addressing assistance to civilians during disasters. The designation DN-III-E later became the public name of the disaster-relief framework.

A national military civil-protection capability focused on rapid deployment, rescue, evacuation, humanitarian relief, engineering, medical assistance, and security during disasters.

• Disaster-response formation · 2000

  Support Force for Disaster (FACD)

  A permanent SEDENA formation that integrates land and air units with military engineers, medical and health personnel, supply services, military police, canine teams, rescue specialists, and other supporting elements. It provides the organizational backbone for scaling Plan DN-III-E operations during major emergencies.

• Engineering and rescue capability

  Disaster Engineer Brigades

  Four geographically distributed brigades based in Guadalajara, Monterrey, Mérida, and Mexico City. They maintain heavy and light vehicles, rescue equipment, community kitchens, and specialized personnel for evacuation, access restoration, debris removal, and emergency support.

• Emergency public service · 1965

  Military air and ground disaster response

  Plan DN-III-E can deploy Army and Air Force helicopters, transport aircraft, rescue teams, engineers, medical personnel, security units, and logistics resources. Missions include aerial reconnaissance, evacuation, flood rescue, wildfire support, humanitarian transport, medical aid, and community assistance.

• 2023

  Add the Army Emergency Action Battalion to FACDStrategy

  Background

  SEDENA continued to develop the permanent force available for rapid disaster intervention.

  Action taken

  The Army Emergency Action Battalion was added to the Support Force for Disaster order of battle.

  Aftermath

  The standing organization available for Plan DN-III-E deployments was expanded.

  Source

• 2000

  Establish the Support Force for DisasterStrategy

  Background

  Recurring disaster-response requirements created a need for a permanent formation able to combine specialist military capabilities.

  Action taken

  SEDENA created FACD as a standing formation of land and air units, engineers, medical and supply services, military police, and rescue personnel.

  Aftermath

  The plan gained a more formal and scalable operational structure for responding to hurricanes, floods, earthquakes, wildfires, landslides, and other emergencies.

  Source

• 1965

  Create a dedicated disaster-relief annex within the national defense planning systemStrategy

  Background

  Mexico's military planning reforms in the 1960s sought to address national-security risks, including disasters affecting civilian populations.

  Action taken

  National Defence Plan No. III was issued with Annex E devoted to assistance for civilians during disasters.

  Aftermath

  The annex designation became the name of Mexico's continuing military disaster-relief framework after its first major operation during the 1966 Pánuco River floods.

  Source

1. 1Plan DN-III-Een.wikipedia.org
2. 2Secretariat of National Defense: Plan DN-III-Esedena.gob.mx