@beelee Hi. After a lot of trial and error I have concluded that it is the adding of the Increased Factory Production tech that causes the Military Base image to disappear. I added all of the other techs that I customarily use and the image was there. I added the increased prod. tech last and then the MBase disappeared.
Although I like the idea of the Military Base being available (for example to add units to the Russian territories way out west - although I think I agree that the build amount should be fewer than 3 inf.) , I think the Increased Factory Production is a more useful addition.
I'll keep looking or for any other disappearing images and report them as I encounter them, but for now at least I know what to avoid if I want the Military Base image to appear.
Thanks for the map (I really enjoy playing this version) and thanks for the quick replies.
PS: I enjoyed the joke about the Bunkers disappearing because they taken out by bombers.