Valles Caldera Valles Caldera dates back to the prehistoric times: spear points dating to 11,000 years ago have been discovered. Several Native American tribes frequented the caldera, often seasonally for hunting and for obsidian, used for spear and arrow points. Obsidian from the caldera was traded by tribes across much of the Southwest. Eventually, Spanish and later Mexican settlers as well as the Navajo and other tribes came to the caldera seasonally for grazing with periodic clashes and raids. Later as the United States acquired New Mexico as part of the Treaty of Guadalupe Hidalgo in 1848, the caldera became the backdrop
Sita Valles the alleged putsch of May 27, 1977. She is thought to have been shot in August of that year. The book written on her by journalist Leonor Figueiredo says: "It is said that Sita Valles was shot at five in the morning of August 1, 1977. One shot on each leg, one shot on each arm. The body fell into the ditch that had been previously dug, before the deadly firing. Of what remained of Sita, after the torture and the orgy of rape by the men of the Angola Information and Security Directorate (DISA), the regime's political police. A