The treaty of Tordesillas regulated colonization, but it ended up falling by the wayside as countries not party to the treaty decided to just ignore it. https:

The treaty of Tordesillas regulated colonization, but it ended up falling by the wayside as countries not party to the treaty decided to just ignore it. https://en.wikipedia.org/wiki/Treaty_of_Tordesillas https://en.wikipedia.org/wiki/Treaty_of_Tordesillas