"The US already has a military base in Greenland, currently staffed by up to 150 people, and has the option of bringing in far greater numbers under existing agreements with Copenhagen. But the Danish-led initiative is seen as signalling to the Trump administration that its European allies also have a stake in security in the Arctic and North Atlantic. Sweden's prime minister said Swedish army officers had been sent to Nuuk on Wednesday. Two Norwegians and one British military officer were also being sent. Downing Street said the UK shared President Trump's concern about "the security of the High North", and said the deployment involved "stepping up with stronger exercising, to deter the Russian aggression and the Chinese activity." Danish Prime Minister Mette Frederiksen said on Thursday that defence and protection of Greenland was a common concern for the entire NATO alliance."