| Secret Six (1968)
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Publisher: DC Comics
Publication Date: Apr/May 1968 - Apr/May 1969
Country: United States
This is, in a sense, the beginning of Villains United. It's the first appearance of any form of the Secret Six, and a line of succession between the (as of 2005) three groups can be drawn starting here. Few of the story themes from these issues really appear in Villains United, but it's interesting backstory nonetheless.
Note that because the characters here were meaningfully, and not too illogically, included in the post-Crisis appearance of the Secret Six in Action, the events of this title are still DC "canon" as of 2005.
Number of issues cataloged: 7
Number of users with this title in their pull list: 1