Sovereign Base
Sovereign bases are exclaves under the full sovereignty of a remote state, typically established through treaties, for the purpose of securely maintaining military installations outside the state's main national territory.
The term sovereign base is not a formal category in international law with the only extant sovereign bases being Akrotiri and Dhekelia in Cyprus. These military bases retained British sovereignty in 1960.
American sovereign bases have been suggested as a part of the solution to the Greenland crisis, dispensing with the need to ask permission from Denmark although there are concerns that this is not a stable solution. Other overseas military installations have been compared to sovereign bases, such as Guantanamo Bay, Mayotte and Diego Garcia.