The targeted countries host sprawling American military bases and thousands of personnel at a time when the United States is waging war against Iran.

© Arash Khamooshi/Polaris for The New York Times

As the Iran war drags on, Oman — a U.S. ally and mediator with Iran — has found itself at odds with the Trump administration and some of its own neighbors.

© Altaf Qadri/Associated Press