Algeria
France made Algeria a colony in 1830.
There are more than four countries that were once French colonies. Vietnam was once a French colony, as was Algeria, Gabon, Madagascar, Mauritius, part of India, part of the United States, and many others.
Part of the UK was once a colony of the ancient Roman Empire
Haiti, the Ivory coast, Senegal, Algeria or Vietnam are all former French colonies. And there are more other countries, especialy in Africa.
Well it was a part of India.
Hong Kong, which is now part of China.Singapore is also a former British colony in southeast Asia.
yes
Justinian reconquered former lands of the western part of the Roman Empire: Italy, Tunisia, western Libya and eastern Algeria, and southern Spain. The latter was the westernmost one.
Algeria
Algeria.
It was, between 1830 and 1962.