Germans reclaim Heligoland from the United Kingdom, 1951
Heligoland (also spelled Helgoland) is an archipelago 46 kilometers off the German coastline in the North Sea. The two small islands are less than 2 square kilometers in total, but the British, Danish and Germans have hotly contested the land over the centuries. In the Second World War, the British Air Force frequently bombed the islands, most notably in air to sea battles in 1939 and in 1945, when the residents of the island were forced to abandon their rock shelters and evacuate due to an enormous Allied air raid.