Rwanda was ruled by Belgium from about 1918-1960.
No country can be a colony, otherwise it wouldn't be a country.
Rwanda was a German colony from 1884 to 1919.At the end of WWI the League of Nations gave control of Rwanda to Belgium, which lasted from 1919 until the revolution in 1959.
The first European settlement in Australia was a penal colony.
France.
Brazil
Belgium.
Rwanda and Burundi were a German colony, but came under Belgian rule after World War 1.
The Netherlands
Bulgaria
Great Britain
france?