11 What has outstanding offensive and defensive capability and represents the aweing tip of the spear in a major land war? It’s the M1A2 System Enhancement Package (SEP) version 3 (v3) main battle tank, which wrapped up extensive cold-weather testing at U.S. Army Cold Regions Test Center (CRTC) this winter to ensure it functions as it should wherever in the world it could be called on to serve. Since testing at the Department of Defense’s lone extreme cold natural environment testing facility began in January 2020, the SEPv3 was driven more than 2,000 miles in rugged conditions across three seasons of sub-Arctic weather, fired hundreds of rounds for accuracy in extreme cold, and underwent testing of its auxiliary power unit, as well as numerous other sub-systems.