Which German island was traded for control of Zanzibar by Great Britain in 1890?
British Administration of Heligoland Hellgoland Helgoland Helgioland Helgoland Power Cable Island of Helgoland Heligoland British Heligoland
island of helgoland helgoland power cable british heligoland helgioland british administration of heligoland heligoland helgoland hellgoland
heligoland
WikipediaEntity
Heligoland