Currently, 1,700 military personnel, mostly United States forces, with around 50 British troops, and a further 1,500 civilian contractors reside there.[8] The installation fills several roles including serving as a support facility for both surface fleets and submarine units in addition supplying regional operations in conjunction with Military Sealift Command.[9] The base is also home to a sophisticated radar, space tracking and communications facility along with a fully operational joint Navy and Air Force airfield.The entire population of approximately 1,600 Chagossians were removed from 1967 to 27 April 1973, with limited financial compensation being paid out to the former inhabitants as well as several legal challenges.US intervention in the Middle East resulted in the construction of two exceptionally long (2.3 mile) runways, heavy aircraft storage and maintenance facilities and a large fuel depot.