The other answers pointed out very correctly that Algiers was legally considered a part of France. What must be added is that there was a very large body of French colonists in Algiers, which was not the case with the other French possession, whatever their legal status.

The other answers pointed out very correctly that Algiers was legally considered a part of France. What must be added is that there was a very large body of French colonists in Algiers, which was not the case with the other French possessions, whatever their legal status.