Soldiers from the 25th Infantry Division march during Operation Punchbowl at Joint Base Elmendorf-Richardson, Alaska, Feb. 10, 2018. Operation Punchbowl was a battalion-level, combined arms, live-fire exercise that focused on arctic lethality. During the operation, three 150-soldier companies maneuvered through varied terrain.

Air Force photo by Alejandro Peña

Watch the U.S. Army and Air Force prepare to fight in the extreme cold in the video below: