That is called an 'Alliance' or a 'mutual defence pact'
That is called an 'Alliance' or a 'defence pact'
vassals. Vassals were appointed by a lord to protect him in exchange of land.
When you leave a country it is called emigration.When you arrive in a country it is called immigration.
A person who comes from another country is called an immigrant.
A country that is a 'friend' of another country is called an ally.
The movement of people from one country to settle in another country is called immigration.
its called nationalism or, it could be colonization.
When a company hires people in Another Country to do work for them, it is called outsourcing.
When a company hires people in Another Country to do work for them, it is called outsourcing.
When people leave their country to live in another country, it is called emigration.
It's called conquering
A person who leaves a country to go live permanently in another is called an emmigrant,