Arbeitskommandos
At each stalag the German Army set up sub-camps called Arbeitskommando to hold prisoners in the vicinity of specific work locations, whether factories, coal-mines, quarries, farms or railroad maintenance. These sub-camps sometimes held more than 1,000 prisoners, separated by nationality. The sub-camps were administered by the parent stalag, which maintained personnel records, collected mail, International Red Cross packages and then delivered to the individual Arbeitskommando. Likewise any individuals that were injured in work, or became ill, were returned to the Lazarett (medical care facilities) at the parent stalag.
Read more about this topic: Stalag