Help me find this game!

I can't remember its name, I've spent a while googling and looking through categories on Abandonia, and Home of the Underdogs went tits-up this year so that's no help either. Now I turn to you, shack.

As I remember, it was a top-down, hex-based, turn-based war game. The units were modern-to-futuristic, with regular tanks and hover tanks, infantry, indirect artillery, and the like. I think there was a unit called the MegaTank, and an artillery unit called GSM, nicknamed "Grunt Smashing Missile" (though googling that phrase comes up with zilch).

It played a lot like Uniwars (the recent iPhone app), and It would have been from 1996 or a few years before then. Does anyone else remember it, or am I crazy?