U.S. Army Pfc. Tyler Finocchiaro, assigned to the 3rd Brigade Combat Team, 10th Mountain Division, participates in a ruck march during Exercise Southern Vanguard 25, in Antuco, Chile, Aug. 25, 2025. Exercise Southern Vanguard 25 underscores the U.S. Army’s enduring commitment to regional partnerships as U.S. forces deploy to Chile to conduct combined mountain warfare, field, and command post training alongside Chilean forces. Argentina and Peru are also participating—strengthening interoperability, shared readiness, and mutual trust while advancing regional security and cooperation across the Western Hemisphere. (U.S. Army photo by Sgt. Jean Sanon )