1st Battalion 4th Infantry was activated in 1990 in Hohenfels, Germany to conduct operations as the Opposing Forces for the Joint Military Readiness Center (JMRC) to prepare American and NATO forces to defend against any aggressors that would seek to attack Europe or any of it’s neighbors. During the mid-1990s, JMRC was used to train peacekeeping forces for the former Yugoslavia under low-intensity conflict missions. Currently, the OPFOR mission has since been modified for counter-insurgency training and the multi-domain extended battlefield.

The Battalion’s mission extends beyond the border’s of the JMRC to other Countries as request partnership training with the Infantry Battalion.