Air Force
An air force – in the broadest sense – is the national military branch that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army aviation or naval aviation units.
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Fun fact https://x.com/Rainmaker1973/status/1741404200813113849
The US Air Force is the world's largest air force.
The US navy is the second world's largest air force.
The US navy has also its own army which in turn has its own air force. The US Marine Corps Aviation is the world's fifth largest air force.