To get a specific nation, you need to know the identifying slug we use for that nation.
Look up the slug on Native-Land.ca, in the API section of your account after you log in. Just do a search for the nation you are interested in, and you will see all the available slugs you can use.
You can get more than one result at once, across multiple categories. Mix and match how you like!
An example query might look like this:
You can also combine this with a position request, if you like.