When the cop says to drop your weapons, you cry "MOLON LABE!" before being riddled with bullets.
Also, you pronounce names of ancient states or cities correctly, such as Epeiros, Makedon, or Qarthadast (although I am not so far gone that I refer to Greece as Hellas or Rome as Roma).
Also, when you watch Lord of the Rings, you find yourself mentally replacing the types of soldiers with ancient counterparts (if applicable).
Also, you don't have a girlfriend because whenever you are around females you are too busy with discussions about Central Asian nomadic warfare to talk about ponies or fairies or lesbian fantasies or whatever it is that girls talk about.
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