Wikipedia
JEFX
JEFX, or Joint Expeditionary Force Experiment was the periodic US Air Force-led operational experiment created to evaluate new technologies and war fighting concepts in a simulated wartime battle environment. It was an outgrowth of the C4I (Command, Control, Communication, Computers and Intelligence) Initiative mandated by the Goldwater-Nichols Act of 1986. It was monitored by the Air Force senior leadership and each event culminated with a report for the Chief of Staff of the Air Force.