 As the Allied armies advanced eastward through France, groups of "stay-behind" enemy agents were rapidly ferreted out from their places of concealment and, if of French nationality, turned over to the French for examination and trial.Caches of explosives that had been prepared and stored or set in place to destroy key points, facilities, infrastructure, personnel, and equipment, were retrieved from underground storage vaults and rendered harmless.So effective were these efforts, that instances of sabotage were few and isolated.