After US President Donald Trump recently said he had secured total and permanent US access to Greenland in a deal with NATO, many questions remained as to what exactly this meant — especially as details regarding the content of the deal remained unclear.

International media reports suggested that one proposal under consideration by Trump might involve the establishment of US military bases in Greenland similar to the UK’s Sovereign Base Areas in Cyprus. 

What are these bases, and why might the US be considering them?