[ranger207]

You're probably thinking of the 2002 Millennium Challenge. That was a wargame plus a training exercise, which complicates things. For example, there were real US Navy ships out in the Persian Gulf, but to avoid disrupting commercial traffic they were confined to a specific area. The OPFOR (opposing forces) commander knew the confines, so he didn't have to scout for BLUFOR (US forces), and BLUFOR couldn't maneuver to avoid him. For another example, BLUFOR was jamming and destroying all of OPFOR's communications, so OPFOR switched to motorcycle runners. Unfortunately the simulation software didn't exactly support motorcycle runners, so they moved just as fast as radio communications but were invulnerable to BLUFOR strikes.

BLUFOR kept getting revived because it was also a training exercise in addition to a wargame. You've got dozens of ships gathered in the area to practice formation maneuvering, underway replenishment, etc, under wartime conditions. If you're on a ship that's blown up on day 2 of 20, what are you supposed to do for the rest of the time? It's better for training to revive casualties.

Stuff like this is why it's not easy to trust the outcome of a wargame.