Complex sentence: During the mid- 1990s, JMRC was used to train peacekeeping forces for the former Yugoslavia under Low-Intensity Conflict missions, which has since been modified for counter-insurgency training for Operation Iraqi Freedom and Operation Enduring Freedom.
Split into simpler sentences: 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 for Operation Iraqi Freedom and Operation Enduring Freedom.