And, for anyone who saw the fantastic ending to Peacemaker's second season, our earlier prediction that CHECKMATE! would be established in the cinematic DCU proved 100% correct. first appeared in Superman's ACTION COMICS # 598 (1988), the evolution of a specialized branch of Task Force X known as The Agency, which itself was established in 1985'sVigilante # 36 (1986), the now classic Copper Age key that pitted VIGILANTE Adrian Chase against THE PEACEMAKER.
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