I love the look of military bases, with a big wall and all the amenities inside it. I want a neighborhood more like a realistic military base than the ittie bittie rabbithole. Preferably with a big wall around it. I'm doubtful that such a neighborhood exists, so in lieu of that, I'd appreciate any help in finding an empty map that I could use to build my own neighborhood. I'm not sure about what types of fences are available in edit town, so I guess third on my list is a big wall for edit town.
Please and thank you for any help you can provide.

This is the only one I can think of that is somewhat close to a military type world:
http://www.mysimrealty.com/WORLDS_FortCollins.html

Here is a list of worlds by theme:
https://cawtool.fandom.com/wiki/Worlds_by_Themes

Thanks a bunch! Still a lot of websites I don't know about!

That's actually a really cool idea for a world! My ex-husband was in the Air Force, and we lived on several different bases. Might be a fun project to tackle after I finish the world I'm currently working on!