The republic of Congo was often used by the Belgians and French to evacuate civilians when there was a crisis in the-other-Congo/Zaire.
The Belgian/French/Congolese armies often practice together. In fact, only the Congo river seperates Brazzaville from Kinshasa.
This kind of rescue operations were done quite a few times, makes you wonder why those people go back and why the Belgian government keeps investing in such operations since people now know the risks. After such upheavels most of the possesions of foreign people are plundered and sometimes their houses were burned down.