I'm SURE I'm not the first person to do this but a search didn't turn up any threads that looked like they were about it, so ...
I just achieved a total victory (83-15) over the PC with 247 casualties (52 KIA) inflicted to 1 sustained (0 KIA) in a 2000 point game. The way I did it was ultimately pointless but rather fun so I thought I'd share it.
Was messing around with CMBO and got rather bored so decided to try an experiment. Set up a game with 2000 points apiece, `small' map (it wasn't but nevermind), urban, moderate trees, small hills, with myself as Axis defending against the CPU Allies. All units allowed.
When it came to equipment purchasing I bought 10 75mm bunkers and 9 MG bunkers (and, to use up a few spare points a veteran MGer). Then I built a `ring of steel' around the town I was defending. Well, more of a semicircle of steel, but you get the point. Paired up the anti-tank and anti-personnel bunkers with the clearest possible views of any enemy approaches, then hit go.
One of my bunkers got knocked out by a fluky shot, eight more ran out of ammunition towards the end but not a single hostile unit got anywhere near any of my flags. I just sat back and watched the fireworks. Which were copious.
Next time you're at a loose end, or just want to take some revenge on your computer, give it a go! (Oh, and next time anyone accuses fortifications of being useless you'll be able to prove they aren't!)