How do you make and place hidden resources?

I like to have unique units and want to make some region specific troops for everyone viking style.

So for example how would make a hidden resource of say Amazons and place said resource in Themiskyra?

Read this. The Guides, Tutorials & Tools forum is always a good first place to look if you have any modding queries.

Thanks alot man. And that was damn easy. When I was at work today I thought of something to try and it was almost that. I just missed the adding it to the top of descr_build.