This would be mostly Great Britain and France: you can see that many countries today still speak English and French in Africa.
Portugal also had some land under its control: Angola and Mozambique.
Now, I am unsure about the forth one, as there is a number of countries that had a colony, but were not as present as the ones I mentioned above. These are Belgium, Italy, Germany and Spain.
Federalism is a system of government that creates two relatively autonomous levels of government, each possessing authority granted to them by the national constitution.
