the answer wrong. central asia has eight countries actually.
If this is pre-WWI, then I'd say it is because everyone, well mainly the smaller countries, where quick to call their "big brother" or largest alliance holder to help them when a problem faced them, threating like a small child would say " Stop, or i'll call my big brother to beat you up! "
The United States Doubled in size
The Declaration of Independence declared America independent while the Treaty of Paris recognized America as independent (Britain did not recognize America as independent until after the Revolutionary War so the Treaty of Paris)