Some haven't and are engaged in it outright or through proxy. China claims all of the South China Sea (and islands) to be theirs. Ethiopia, I personally believe

Some haven't and are engaged in it outright or through proxy. China claims all of the South China Sea (and islands) to be theirs. Ethiopia, I personally believe, is just still playing with the idea of taking parts of Somalia. This would be done already if their government wasn't already corrupt. And Morocco still claims Western Sahara, a quasi independent nation with no formal government. And don't even get me start on Israel and the west bank.