In order for a nation to exist, which of the following must be true?

Some people would say that a nation needs a language, culture or religion in common, but this is not true- look at Switzerland, which has 4 official languages.

What is really needed for a country is that it's independent and sovereign an that it must be able to handle its own affairs.

Amuslim warrior especially : one victorious in battle against the opponents of islam —often used as a title of honor.