Not allowed to live in most places in the world?

In the past, conquests were a common phenomenon. Therefore, it is reasonable to assume that most of the territories in the inhabited world are occupied, that is, the current ruling government previously conquered another people who were born in the area. Since this is the case, I ask whether it is forbidden to live in such a place for the sake of pleasure. After all, I did not receive a ‘visa’ from the natives who are the real owners of the place. What do you think?

First, there is no claim to the vast majority of the territories. And even when there is, there is no evidence. And even when there is, you must distinguish between sovereignty and ownership.

What about honoring a buyer?
Ammon and Moab were purified by washing

Homo sapiens invented for himself ‘natural ownership’ over territories
Mainly by force of arms
Homo sapiens invented for himself ‘natural ownership’ over territories
Mainly by mutual killing, i.e. war, i.e. with all the force

The mouth that forbade is the mouth that defines

Miki, 1. There are potential claimants, but they don't know it or they know they won't be given the land. Is a stolen object halakhically and morally okay to use?
2. Really. We know for sure that Asia was conquered, for example. These are not the same natives from ancient times. Therefore, they do not have the legitimacy to give me a visa.
3. I'm not asking about ownership, I'm asking about sovereignty. Every country has the right to decide which residents will live in its territory and which will not. Why can't the original indigenous government prevent me from doing this?

Okay, I'm done. I'm trying to waste my time on more interesting and relevant questions.

One can argue about what is interesting (by the way, it is related to the Israeli-Palestinian conflict), but it is certainly relevant to everyone's life.