No, Istanbul is not a state or a country, it is the biggest city/province of Turkey.
You neglected to say who "we" is, so we cannot give you a firm answer -- however, for the majority of the world, independence was gained from at least one of:
- Spain, and
A country is an independent state or nation with its own government. A self-governing nation A group of provinces or cities that are under the rule of a central government.
what is a border line
London is 6 hours ahead of Hutchinson.