Military operations are characterized by the most challenging environmental conditions that any display system will encounter. Pilots in a bubble canopy cockpit interface with displays in an extremely bright ambient lighting condition, making sunlight readability a serious consideration. All military equipment, displays or otherwise, may experience severe environmental conditions (vibration, shock, heating, electromagnetic) in systems ranging from Army tanks and land vehicles, to Air Force aircraft, to Navy ships and submarines. As new display technologies evolve a host of system level performance issues need to be thoroughly tested and evaluated before they transition to military applications. Unlike electromechanical and CRT based instruments, most flat panel displays (FPDs) lack sufficient operational data to thoroughly characterize their performance capabilities under realistic operating conditions. Laboratory testing, therefore, can serve as a crucial source of performance data under simulated operating environments. Presented here is an overview to FPD testing that addresses test categories, standards, and areas of concern.