Channel Islands Occupation Society

Founded1961 [1] Jersey branch 1971
HeadquartersJersey and Guernsey
WebsiteJersey Branch,Guernsey Branch
This Command Bunker forms part of Battery Lothringen, a site managed by the CIOS (Jersey Branch)
10.5cm Casemate at Corbiere managed by the CIOS Jersey

The Channel Islands Occupation Society (CIOS) is a voluntary organisation that seeks to study all aspects of the German occupation of the Channel Islands and to raise awareness and educate the public about the occupation during the Second World War.[2] 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. In 2010 it was converted into a limited liability company.[3]

Sites open to the public:[4]

Guernsey Branch

Founded in 1961, by Richard Heaume, M.B.E.,in Guernsey, the society still researches all aspects of the German Occupation of the Channel Islands. It has an archive of historical documents, and also renovated the former German naval Signals H.Q, which was responsible for all messages to the islands from France and then Germany after D Day. The Guernsey branch is a member of the Association of Guernsey Charities, and donates money every year to The British Red Cross, in recognition of the help given to islands by the International Red Cross in 1944 and 1945, with supplies of food to the local population.

Guernsey CIOS works with Festung Guernsey and private owners as regards sites open to the public in Guernsey:[8]

  • Fort Hommet Casemate
  • St Jacques Naval Headquarters
  • MP3 Tower, Pleinmont
  • German Underground Hospital, St. Andrews
  • La Vallette Tunnels


In addition to the annual publication Channel Islands Occupation Review which has been produced since 1973, the society has published a sequence of books under the title Archive Book dealing with specific subjects such as Archive Book 5 Channel Islands Merchant Shipping 1940 - 1945

Photos of managed fortifications

CIOS Jersey

CIOS Guernsey

See also


  1. ^ "CIOS Review". CIOS Guernsey.
  2. ^ "Heritage groups and organisations". Jersey government.
  3. ^ "About The CIOS". CIOS Jersey. Archived from the original on 2016-04-04. Retrieved 2016-07-17.
  4. ^ "Bunkers". CIOS. Archived from the original on 2016-06-25. Retrieved 2016-07-17.
  5. ^ "Walking Through History" (PDF). Channel 4.
  6. ^ "CIOS - GERMAN STRONGPOINT CORBIERE'". Visit Channel Islands. Archived from the original on 2016-08-20. Retrieved 2016-07-17.
  7. ^ "Jersey under German Occupation". standwheretheyfoughts jimdo page!. Retrieved 2020-12-27.
  8. ^ "Fortification Opening Times". festungguernsey. Archived from the original on 2016-06-17. Retrieved 2016-07-17.

External links

  • Jersey Branch
  • Guernsey Branch
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