You remember those , right? 02/21/2013 - U.S. Soldiers with Bravo Company, 3rd Battalion, 66th Armor Regiment, 172nd Infantry Brigade prepare for a simulated training scenario using the Dismounted Soldier Training System (DSTS) at Grafenwoehr, Germany, Feb. 21, 2013. The DSTS is the first fully-immersive virtual training environment to conduct dismounted Soldier operations.