Secretariat of National Defense (Mexico) in the context of Secretary of War and Navy (Mexico)

The Mexican Armed Forces (Spanish: Fuerzas Armadas de México) are the military forces of the United Mexican States. The Spanish crown established a standing military in colonial Mexico in the eighteenth century. After Mexican independence in 1821, the military played an important political role, with army generals serving as heads of state. Following the collapse of the Federal Army during the 1910–1920 Mexican Revolution, former revolutionary generals systematically downsized the size and power of the military.

The Mexican military forces are composed of two independent entities: the Mexican Army and the Mexican Navy. The Mexican Army includes the Mexican Air Force, while the Mexican Navy includes the Naval Infantry Force (Marine Corps) and the Naval Aviation (FAN). The Army and Navy are controlled by two separate government departments, the National Defense Secretariat and the Naval Secretariat, and maintain two independent chains of command, with no joint command except the President of Mexico.

Lázaro Cárdenas del Río (Spanish pronunciation: [ˈlasaɾo ˈkaɾðenas] ; 21 May 1895 – 19 October 1970) was a Mexican army officer and politician who served as president of Mexico from 1934 to 1940. Previously, he served as a general in the Constitutional Army during the Mexican Revolution and as Governor of Michoacán and President of the Institutional Revolutionary Party. He later served as the Secretary of National Defence. During his presidency, which is considered the end of the Maximato, he implemented massive land reform programs, led the expropriation of the country's oil industry, and implemented many key social reforms.

Born in Jiquilpan, Michoacán, to a working-class family, Cárdenas joined the Mexican Revolution and became a general in the Constitutionalist Army. Although he was not from the state of Sonora, whose revolutionary generals dominated Mexican politics in the 1920s, Cárdenas was hand-picked by Plutarco Elías Calles, Sonoran general and former president of Mexico, as a presidential candidate and won in the 1934 general election.

The banderas monumentales (Spanish for "monumental flags") are a collection of tall flagpoles containing large flags of Mexico located throughout Mexico. They are part of a program started in 1999 under President Ernesto Zedillo that is currently administered by the Secretariat of National Defense (Secretaría de la Defensa Nacional). The main feature of these monuments (though not the biggest, see below) is a giant Mexican flag flying off a 50-meter-high (160-foot) flagpole. The size of the flag was 14.3 by 25 metres (47 by 82 ft) and it was flown on a pole that measured 50 metres (160 ft) high. In the time after the decree was issued, many more banderas monumentales have been installed throughout the country in various sizes and proportions. Many of the chosen locations were chosen due to significant events in Mexican history that occurred there.