The biggest influence on Addu's modern history has been the British bases, first established on the island of Gan during WWII, as part of the Indian Ocean defences. In 1956, the British developed a Royal Air Force airfield as a strategic Cold War outpost. The station had around 600 permanent personnel, with up to 3000 during periods of peak activity. They built a causeway connecting Feydhoo, Maradhoo and Hithadhoo islands, and employed most of the local men. In 1976 the British pulled out, but many of their employees, who spoke good English and had experience working for westerners, were well qualified for jobs in the soon-to-be-booming tourist industry.