Two small companies have partnered to create a relatively small two-box system designed as an early warning system for drivers of Marine Corps and Army off road vehicles to prevent rollovers, an executive from one of the firms said. Archangel Systems, Inc. and the Fredericks Company had their Vehicle Protective Rollover System, which they call V-PRO, on display during the Modern Day Marine symposium at Marine Corps Base Quantico, Va., this week. Bill Dillard, Archangel’s director of…