I expected this comment. The same wikipedia page also says:
> There are currently three territories sometimes claimed to be terra nullius: Bir Tawil (a strip of land between Egypt and Sudan), *four pockets of land near the Danube due to the Croatia–Serbia border dispute*, and parts of Antarctica, principally Marie Byrd Land.
https://en.wikipedia.org/wiki/Terra_nullius
Next, someone says that wikipedia is not a credible source.