Checkmate is a fictional covert operations agency appearing in American comic books published by DC Comics. The antihero team first appeared in Action Comics #598 (March 1988) and proceeded to have its own ongoing title in Checkmate! .
Checkmate is a fictional covert operations agency appearing in American comic books published by DC Comics. The antihero team first appeared in Action Comics #598 (March 1988) and proceeded to have its own ongoing title in Checkmate! .
Source: Wikipedia "Checkmate (comics)" · CC BY-SA 4.0
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