Who is Hubert Pericand from Suite Franaise and what is their importance?

Hubert Pericand is a chubby-faced, sweet adolescent who has glorified ideas about defeating the Germans. He escapes his family one night to go join the French army. When he finally arrives where there is military action, he is too immature and too young to be of help the soldiers, but he tries. He realizes that the French army might be determined, but that it also has a severe shortage of arms and ammunition..... that their defeat is inevitable.