The camps were built by the Nazi Organisation Todt (OT) to house the labour used to build fortifications including bunkers, gun emplacements, tunnels, air-raid shelters and other concrete and field fortifications. Lager Norderney, containing Russian and Polish POWs, and the Lager Sylt camp holding Jewish slave labourers, were transferred to SS administration in March 1943 under the control of Hauptsturmführer Maximilian List. There are 397 graves in Alderney, which when added to the men who died in ships, takes the total to over 700 out of a total inmate population of 6,000 who lost their lives before the camps were closed and the remaining inmates transferred to France in 1944.