Participation in UN Peacekeeping Operations (UNPO)  is one of the expressions of the global responsibility of a state.

For that reason, and in keeping with the decision announced by President Enrique Peña Nieto at the United Nations General Assembly on September 24, 2014, Mexico was reincorporated into UNPO in April 2015.

Members of the National Defense Secretariat and the Navy Secretariat, including Staff Officers and Military Observers, participate in the United Nations Stabilization Mission in Haiti (MINUSTAH), the United Nations Missions for the Referendum in Western Sahara (MINURSO) and the United Nations Interim Force in Lebanon (UNIFIL).

Mexico had formed part of the UNPO on three previous occasions, the first two with Military Observers in the Balkans (1947-1950) and Kashmir (on the border between India and Pakistan in 1949), and subsequently in El Salvador (1992-1993) with 120 policemen.

Mexican Armed Forces personnel have been trained by the UN with certified courses, with the valuable support of friendly countries such as Germany, Argentina, Brazil, Canada, Chile, China, Colombia, Ecuador, Spain, the United States, Finland, Guatemala, India, Norway, United Kingdom, Sweden, Switzerland and Uruguay.

The skills and training of Mexican personnel meet the highest standards, enabling them to provide a high-profile performance, which contributes to international peace and security through the humanitarian assistance they provide, in keeping with the normative principles of foreign policy established in the Constitution.

Mexico is the second largest Latin American financial contributor to the budget of these operations and reiterates its commitment to the defense of the major causes of humanity, such as keeping international peacekeeping, in accordance with United Nations principles and values.