YPG is a test facility for the U.S. Army. A huge variety of weapon systems and munitions are tested. The proving ground is Yuma County's largest single employer of civilians and the county's primary high technology workplace. The proving ground's land mass amounts to about 20 percent of Yuma County. Approximately 450 people reside in housing at the proving ground.
Each winter the U.S. Army Parachute Team, The Golden Knights come to YPG for annual training.