By definition, to be an imperial power it would need colonies.
The US is a former colony and is by it`s history of being that and bringing down some of the greatest imperial powers a antiimperialist country.
"I am not among those who fear the people. They and not the rich, are our dependence for continued freedom." -- Thomas Jefferson, 1816 "[F]acts are before ideas." -- Mikhail Bakunin, 1882
Then, there would be that 'leading from behind' thing that'd be hard to call any sort of invasion by any stretch.
True, back in WW II the Libyan desert was the theater for the British and German amour going at each other.
Have I missed anything?
Nancy Pelosi said: “We have to pass it, to find out what’s in it.” A Doctor called to a radio show & said: "That's the definition of a stool sample"
"Under my plan of a cap-and-trade system, electricity rates would necessarily skyrocket," Barack Obama January 2008
"It's always reassuring to find you've made the right enemies." -- William J. Donovan
I wasn't aware that the U.S., Shah Pahlavi, or anyone else had Mohammed Mossadegh killed.