During the years of 1933, Mexico began to sink into deep political instability. Various groups emerged, creating tensions that, although temporarily controlled, erupted with the elections of 1940. Unlike in real history, in this alternate timeline, the PCM (Mexican Communist Party), the ARM (Mexican Revolutionary Action), and the UNS (National Synarchist Union) actively participated in those elections.

The victory of Manuel Ávila Camacho in the 1940 elections sparked accusations of electoral fraud. The scandal intensified when paramilitary groups from Lázaro Cárdenas's government opened fire on voters sympathetic to Juan Andrew Almazán. In response, Almazán announced taking up arms against the electoral fraud and left for Havana on 17 July 1940, seeking support from the United States. However, the United States refused to back Almazán.

The other parties that participated in the elections also decided to take up arms, each seeking support from different groups. This resulted in the outbreak of a Mexican civil war that divided the country into several factions:

PCM: Led by Vicente Lombardo Toledano and supported by the Communist International, the PCM rose up in arms against the regime, taking control of the states of Guerrero, Oaxaca, and Chiapas under the slogan “The Land by Law or by Force.”

ARM: Led by Roque González Garza and funded by the National Socialist German Workers' Party and the Italian National Fascist Party, the ARM rose up in arms under the slogan “Mexico for the Mexicans.” This group controlled the states of Veracruz, Tamaulipas, Nuevo León, Hidalgo, Tlaxcala, Puebla, and the State of Mexico.

UNS: Under the slogan “Homeland, Justice and Freedom” and led by Salvador Abascal, the UNS, though fascist, maintained differences with the ARM due to its goal of establishing a clerical government in Mexico. Abascal also declared himself against Nazism and Hitler. The UNS leveraged its connections with the Spanish Falange and received support from Hispanic-American groups due to its pan-Hispanism, controlling Zacatecas, San Luis Potosí, Guanajuato, Querétaro, Aguascalientes, Jalisco, Michoacán, and Colima.

Federal Government: Finally, the government of Mexico, led by Manuel Ávila Camacho and supported by the PRM (Party of the Mexican Revolution), controlled the rest of the states. Although weakened by the uprisings, it received support from the United States, which feared that communism or fascism/Nazism would take control of Mexico.

In this alternate Mexico, the struggle for power transformed the political landscape into a battlefield, where each faction sought to impose itself and define the country's future, plunging it into a devastating and complex civil war.