Since I was a kid - a long, long, long time ago - I would get interested in an wargame, but after buying it and before playing it, I would go buy numerous books on the battle/campaign/war and read them first. I’ve got a pretty large library of military history books as a result. To this day, I prefer paper books over kindle when it comes to military history (though there are some for which I have both, since it is much easier to read large history books on the plane on long trips on the Kindle vs. carrying 50 pounds of books. ;)
If i wasn’t a military history buff I don’t think I’d be very interested in computer wargaming just for the sake of gaming.