Abstract
Though underestimated by specialists, for their "popular literature" character, middle 19th century calendars are a rich documentary source about the North American intervention in Mexico. Starting on 1847, editors such as Cumplido, Rodríguez Galván, Ontiveros, etc., began to include in their calendars articles of a political nature, narrations, speeches, satyrs, poetry and images that show some episodes of the war with the United States. These publications highlight the atmosphere that prevailed in the capital where Mexicans and Americans had to live together, and the hostility of the first towards the invaders. The calendar writers point out two essential elements in Mexico's defeat: the serious military mistakes made by Santa Anna and the incapacity of the Mexicans to finish their internal problems, situations that led to the Guadalupe-Hidalgo Treaty being signed, through which more than half of our territory was lost.