I think this Wikipedia article covers most of that situation in a quick-to-read format: https://en.wikipedia.org/wiki/Terra_nullius https://en.wikipedia.org/wi

I think this Wikipedia article covers most of that situation in a quick-to-read format: https://en.wikipedia.org/wiki/Terra_nullius https://en.wikipedia.org/wiki/Terra_nullius There are some other articles out there describing these areas, but I can't recall where to find them.