The NBC News article Why is this tiny Pacific Ocean nation getting VIP treatment in Beijing? says:
David Panuelo, president of the Federated States of Micronesia — a nation of some 600 islands and islets with a population of just 113,000 — is this week visiting China, where President Xi Jinping and other top officials have come out in force to lavish him with attention and offers of economic cooperation deals.
Micronesia, along with the Marshall Islands and Palau, are bound by a "compact of free association" with the United States which gives Washington exclusive military control of the countries’ land, airspace and surrounding waters in exchange for hundreds of millions of dollars in assistance and other privileges. But in recent years, Micronesia has increasingly turned to Beijing for much needed investments and economic aid.
Together with Guam and the Northern Marianas, these countries ensure that Washington controls more than 3 million square miles in the western Pacific — about the size of the continental U.S. — which underpins American dominance in the Pacific, according to experts.
But the pact and its funding program are set to expire in 2023-2024, and the outcome of negotiations to extend it is uncertain.
Do the territorial waters extending around all of the islands of Micronesia, Guam and the Northern Marianas add up to anything close to "3 million square miles in the western Pacific"?
How do the discussed agreements with these countries allow the US to "control" that much area; what kind of control is referred to here? Is it just a poor synonym for "military dominance"?