Newsweek's weekly update maps the locations of 11 aircraft carriers in the Indo-Pacific region as of March 28.

The United States military's northernmost base, Pituffik Space Base in Greenland, is a crucial cog in Washington's missile defences which US Vice President JD Vance will visit on Friday.

The United States formally left the Manta military base in Ecuador on Friday at 9.00 a.m. local time, at a ceremony in which Ecuadorian authorities took full control of the Pacific Coast facilities.

The tiny Pacific nation of Palau has urged the United States military to build bases on its territory - which lies in a region where Washington is pushing back against growing Chinese influence.