At 3:40am, an Icelandic policeman saw a fleet of warships approaching the harbour. The British invasion had started.Iceland, as you may or may not know, is located in the middle of the Atlantic Ocean. Its geographic location makes it a prime outpost for air and maritime operations. Crucially, Iceland serves as a NATO outpost in the North Atlantic. US and NATO forces, having left Iceland in 2006, are now returning to the island on a rotational basis to enhance the monitoring of air and sea activity around the island.