It's a PC game from around 1993, which I bought at GenCon. It was actually quite expensive and I almost didn't get it, but in the end my curiosity got the better of me.
I've thrown out or sold or given away most of my DOS games, but not this one. This one, I kept. The reason I kept it was because it's the only game I ever played where nothing happened. I played it several times, but nothing happened. The first time I played it, I steamrollered over the opposition — they put up no resistance at all. The second time I played it, I just sat there doing nothing to see what the AI opponents would do. They did the same thing. I didn't see any of their units the whole time. They just didn't do anything. After hundreds and hundreds of turns, it was pretty well the same as at the beginning.
Apparently, the game was based on an Amiga game and is an improvement on it. It does look to be the kind of game I was expecting it to be judging by what other people have to say about it. I must have been doing something wrong, but I don't know what that something wrong was.
Hmm. I think perhaps this time I shall throw it away...