The Plan DN-III-E or Civil Relief and Aid Plan for Disasters (Spanish: Plan de Auxilio a la Población Civil en Casos de Desastre) is a series of measures implemented primarily by the Mexican Ministry of National Defense, specifically the Mexican Army and the Mexican Air Force organized as a body under the name of Support Force for Disaster (FACD). This acts in response to a disastrous situation that affects or could affect a large group of civilians in Mexico and, in some cases, abroad. It is also known as the 3rd Army mission entrusted to safeguard and protect civilians in case of disaster.