A Mexican army heading North to regain El Alamo, Texas, and a man who avenges the killing of the Mexicans in the Battle of San Jacinto: these two stories show David Toscana’s obsession to romance Mexican wars with a sense of absurd. Indeed, the army marches with more dreams than weapons, while the man nurses a grudge after more than a hundred years since the bloody battle. The history of the 1836 Texas War and the invasion of Monterrey by the United States in 1846, the scenarios of these battles and the consequences of these two conflicts for the inhabitants of Monterrey are the main themes of David Toscana’s works. In this article, I describe the several references to war of El ejército iluminado and Duelo por Miguel Pruneda. I also aim to explore the aesthetic forms of Toscana’s works, which approach the concept of the new historical novel of Seymour Menton and that of historiographic metafiction of Ute Seydel. This will allow me to identify the soul wounds of the inhabitants of the boundary narrated by Toscana, which had not yet been addressed.