America is not the only country that has had a military presence abroad. Take Bermuda, for example, the Canadian military used to have a post there:
Once an important site in the Atlantic HF/DF net. Under the operational control of CSE Ottawa and fully integrated in the UK/USA Sigint network. Major tasks included Russian and bloc shipping, general naval tasks, BULLSEYE automated DF system, Project Wideband to copy JUMBO (Soviet naval and sub burst traffic) and other spread spectrum methods. There was also a CDAA (Circularly Disposed Antenna Array) on the base.
Bermuda-online.org has a whole wealth of information on the base.
Strange Latitudes 