U.S. Cavalry vs Aliens

There’s an unconfirmed story floating around regarding a U.S. Cavalry unit that encountered a UFO, and possibly even some pesky little aliens, in 1909. As the story goes, a Cavalry unit was in hot pursuit of a gang of Mexican bandits in the Southwestern U.S. in 1909. During their pursuit, the Cavalry unit came upon a cave that they’d never seen before, despite being familiar with the region. Upon entering the cave, they discovered a number of metallic, horseshoe-shaped flying vehicles, along with a small collection of “little grey demons”, which may have been aliens. The Cavalry unit’s horses were spooked by the ships and the creatures, and the Cavalry immediately left the cave. Upon returning the next day, the cave was empty and the ships and aliens were nowhere to be found.