Come to think of it, from Paper #07:
Appendix What Do You Mean You Can’t Destroy the AA Gun? Your Guys Can’t Find Any Rocks?
Whatever happened to sweet, scorched earth?
In the old versions of AA, you couldn’t have multiple AA guns in the same territory. That meant that if Germany lost Western Europe, the Germans would have their own AA gun firing at them on the retake. We didn’t like that.
We liked destroying things as soon as they were going to fall into enemy hands. Putting an AA gun on a defenseless transport was the only legal way to do it.
In AA4, you can just move the gun back to your capital with any other guns, so it’s less of a big deal. But why can’t you just blow up your own stuff? You can’t just push it into the ocean? I mean, you have guns and bombs and stuff, why not just stomp on the AA guns with both feet, like a monkey?
Caspian Sub scientists have been working around the clock to answer this question and they have made a tremendous discovery: the gray plastic pieces are completely indestructible. You will notice that an IC is never destroyed, AA guns are not destroyed, and plastic chips are simply recycled between you and your enemy. We do not know what goes into the gray plastic, but be warned that the gray plastic is EXTREMELY DANGEROUS. Apparently it is made of the same substance they use to make the black boxes in airplanes, only it’s gray. The only way to put an AA gun out of commission is to hide it under the ocean. And notice that even that doesn’t destroy it; it simply cannot hit planes anymore. If possible, build your own units out of this substance.