it was organised by the schutzstaffel - ss-baubrigade i–which was first under supervision of the sachsenhausen concentration camp; and since mid-february 1943 ran under the neuengamme camp in northern germany–near the old telegraph tower at la foulère. it was used by the nazi organisation todt, a forced labour programme, to build bunkers, gun emplacements, air-raid shelters, and concrete fortifications.