ANTUCO, BíO-BíO, CHILE, (August 20, 2025): Soldiers from the U.S., Chile, Argentina and Peru climb the Antuco mountain in preparation for the force integration training phase of Exercise Southern Vanguard 25 in Antuco, Chile, Aug. 20, 2025. Exercise Southern Vanguard 25 underscores the U.S. Army’s enduring commitment to regional partnership as U.S. forces deploy to Chile to conduct combined mountain warfare, field, and command post training alongside Chilean forces, with participation from Argentina and Peru - strengthening interoperability, shared readiness, and mutual trust while advancing regional security and cooperation across the Western Hemisphere. (U.S. Army National Guard photo by Sgt. 1st Class Sebastian Rothwyn)