Global Firepower said the US took the top spot as it "showcases commanding numbers in key material, financial, and resource categories."
The US, which was given a PowerIndex score of 0.0712, leads the world technologically, it said, and is advanced in key medical, aerospace, and telecom sectors, while maintaining an edge in several major industry markets "allowing for a certain degree of self-sustainment."
With 92 destroyers, 11 aircraft carriers, 13,300 aircraft, and 983 attack helicopters, as of April 2023, the country was ranked first in many areas, including the size of its aircraft fleet, number of warships, and its transport fleet strength.
It also had by far the largest defense budget, of $761.7 billion, more than triple that of China in second place, which had a defense budget of $230 billion.