Channel Islands Occupation Society





The Channel Islands Occupation Society (CIOS) is an organisation that seeks to raise awareness and educate the public about the Occupation of the Channel Islands during the Second World War. There are two branches, one in Jersey and the other in Guernsey, that take turns in publishing the Channel Islands Occupation Review. The CIOS manages many German fortifications and archives on both islands.

Jersey branch
The Jersey branch was set up in 1971.

Sites open to the public:
 * Battery Lothringen, (underground command bunker, coastal artillery observation tower)
 * Battery Moltke
 * Strongpoint Corbière, (‘M19’ fortress mortar bunker with linked MG bunker, 10.5 cm coastal defence gun casemate)
 * Sechsschartenturm, St. Ouen
 * Anti-tank gun casemate at Millbrook, St. Lawrence

Guernsey Branch
Open to the public:
 * Fort Hommet Casemate

Publications

 * Channel Islands Occupation Review 40 editions published alternatively by both branches
 * Jersey's German Tunnels 2 editions
 * A guide to the German Shoreline Defences of St Aubins Bay
 * A guide to Strongpoint Corbiere
 * A guide to Batterie Lothringen - (Noirmont Point)
 * The Organisation Todt and the Fortress Engineers in the Channel Islands
 * Operating Under Occupation The story of the life and work of Arthur Clare Halliwell FRCS, Consultant Surgeon at the Jersey General Hospital during the German Occupation 1940-1945,
 * Archives Book 9, CIOS (Jersey), Jersey’s German Bunkers
 * A Guide to German Fortifications on Guernsey 
 * Festung Alderney, the German Defences of Alderney

Photos of managed fortifications
CIOS Jersey