In the context of the years 1940-1944 the French colonial empire takes on prime importance, both from a strategic and geographic point of view. The French South West Indian Ocean islands, escaping the German occupation and its consequences in social life, become strategic bases and positions in the Worldwide conflict. At first, reports of the Vichy government remind us that the particular rythms of colonial history continue : Reunion Island is maintained firmly within the spheres of influence of the Vichysts. But in 1942 the island is liberated by French liberation's (F.F.L.) '. From 1940 to 1942 one of the fundamental political aims of the " national revolution " in Reunion Island is to exercise control over the upcoming ( Youth). Ouranalysis is based on actua lfacts, after examination of important data concerning this period, and explains the consequences of this policy in the colony.