I believe the Boss, Editor Joe, made those changes from my original text. I've always written it as "wargame" though my MS Word spell check always says its wrong.
AND TO BE FAIR. . . Oxford Dictionary: war game, dictionary.com: war game, Merriam Webster: war-game, Free Dictionary: war-game, MacMillan and Collins and Cambridge Dictionaries: war game aaaaaaaaaaaaaand (wait for it) Wikipedia article: Business War Games.
Maybe we should say Conflict Simulation