We're back! C2SI returns for 2025 with a new episode. Recorded last fall but relevant to the the latest headlines, we sat down for a discussion with professional wargaming umpire Jan Heinemann to talk about the history and uses of wargaming, from Prussians preparing for war to modern think tanks preparing to resist an authoritarian takeover of America. Jan is a member of the International Kriegsspiel Society and can be found on BlueSky at https://bsky.app/profile/letsplayhistory.bsky.social.