Lager Sylt was a Nazi concentration camp on Alderney in the British Crown Dependency in the Channel Islands.

It was built by the Organisation Todt (OT) in January 1942 by and for their forced labourers who would be employed in building fortifications including bunkers, gun emplacements, air-raid shelters and tunnels.

Shocked to see a black man beating up white men from the camp, a German naval officer threatened to shoot him if he saw him doing it again.

Tietz was brought before a court-martial in April 1943 and sentenced to 18 months penal servitude for the crime of selling cigarettes, watches and other valuables he had bought from Dutch OT workers on the black market.

It was used by the Organisation Todt, a forced labour programme, to build bunkers, gun emplacements, air-raid shelters, and concrete fortifications on the island.

The German officer left in charge of the facilities, Commandant Oberst Schwalm, burned the camps to the ground and destroyed all records connected with their use before the island was liberated by British forces on 16 May 1945.