I dunno from White Wolf.

I'm not sure I understand the Chainmail/OD&D reference, either. OD&D is very obviously an RPG, whether you are using the matrices in
Chainmail or the "variant" combat tables in the little books.
I think, however, that a wargame is, by definition, not a roleplaying game, ergo, you are not roleplaying when you play one, no matter how much you pretend you're a Prussian general or dwarven captain. There is no role for you to assume other than "player who is controlling this army against the other player." There is no exploration, no fiction, no shared imagined space, no character. Zip.
"Roleplaying" is not this disembodied act you can perform with games like
Monopoly or Hopscotch. If the game does facilitate playing a role in any meaningful way relevant to the function of the game, you can't make it "roleplaying" no matter how much you try to identify or emote.