During the Allied invasion of Normandy, the Maquis and other groups played some role in delaying the German mobilization. The French Resistance (FFI Force Francaises de l'Interieur for "French Forces of the Interior") blew up railroad tracks and repeatedly attacked German Army equipment and garrison trains on their way to the Atlantic coast.

The Maquis were the predominantly rural guerrilla bands of the French Resistance. Initially they were composed of men who had escaped into the mountains to avoid conscription into Vichy France's Service du travail obligatoire (STO) to provide forced labour for Germany. In an effort to escape capture and deportation to Germany, what had started as loose groups of individuals became increasingly organized; initially fighting only to remain free, these bands eventually became active resistance groups.