1952 Event Helgoland, in North Sea, returned to West Germany by Britain 1945 Event German island of Helgoland in North Sea surrenders to British 1944 Event British air raid on German convoy SW of Helgoland 1915 Event German-British sea battle at Doggersbank and Helgoland 1914 Event Battle at Helgoland: British fleet beats German, 1100 killed 1890 Event Lord Salisbury offers Germany Helgoland in exchange for Zanzibar, Uganda and Equatoria 1871 Death Wilhelm Freiherr von Tegetthoff, Austrian Admiral (Helgoland/Lissa), dies at 43 1864 Event Ship battle at Helgoland, Austria-Denmark 1827 Birthday Wilhelm Freiherr von Tegetthoff, Austrian Admiral, Helgoland/Lissa
