Before the arrival of the Spaniards, the territory of what is now the State of Aguascalientes was inhabited by Chichimecas, who made the territory difficult to access. In fact, the total occupation of the lands of El Bajío was a task that would take about two centuries. With respect to this, Viceroy Luís de Velasco offered municipal benefits to those who established settlements to confront the Chichimeca. And for his part, Viceroy Gastón de Peralta decided to confront them directly, which did not end with good results.