Steep Ascent U.S. and Chilean soldiers cross-country ski at the Chilean Army Mountain School in Portillo, Chile, Aug. 27, 2021. Soldiers learned the basics of cold weather mountain warfare as part of Exercise Southern Vanguard. SHARE: Download: Full Size (2.42 MB) Tags: partnerships, Army, Southern Vanguard Credit: Army Pfc. Joshua Taeckens VIRIN: 210827-A-JF826-1002.JPG Photo Gallery