The Mexican Armed Forces have two branches: the Mexican Army (which includes the Mexican Air Force), and the Mexican Navy.

The Mexican Armed Forces maintain significant infrastructure, including facilities for design, research, and testing of weapons, vehicles, aircraft, naval vessels, defense systems and electronics; military industry manufacturing centers for building such systems, and advanced naval dockyards that build heavy military vessels and advanced missile technologies.

In recent years, Mexico has improved its training techniques, military command and information structures and has taken steps to becoming more self-reliant in supplying its military by designing as well as manufacturing its own arms, missiles, aircraft, vehicles, heavy weaponry, electronics, defense systems, armor, heavy military industrial equipment and heavy naval vessels.

Since the 1990s, when the military escalated its role in the war on drugs, increasing importance has been placed on acquiring airborne surveillance platforms, aircraft, helicopters, digital war-fighting technologies,[91] urban warfare equipment and rapid troop transport.

Mexico has the capabilities to manufacture nuclear weapons, but forwent this possibility with the Treaty of Tlatelolco in 1968 and pledged to only use its nuclear technology for peaceful purposes. In 1970 Mexico’s national institute for nuclear research successfully refined weapons grade uranium which is used in the manufacture of nuclear weapons but in April 2010, Mexico agreed to turn over its weapons grade uranium to the United States.

Historically, Mexico has remained neutral in international conflicts with the exception of World War II. However, in recent years some political parties have proposed an amendment of the Constitution in order to allow the Mexican army, air force or navy to collaborate with the United Nations in peacekeeping missions, or to provide military help to countries that officially ask for it.