It’s important to remember that the modern American Empire is really just an extension of the British Empire, only the capital was moved from London to Washington. I’d argue (in fact, I think it’s indisputable) that the Anglo-American (Atlanticist) Empire is simply the Roman (Mediterranean) Empire of the Christian and post-Christian era. Conventional historians typically argue Rome began with the period of Etruscan dominance around 900 BC, that the Roman monarchy began around 753 B.C., that the Roman Republic began around 509 B.C., that the actual Roman Empire began between Julius Caesar’s crossing of the Rubicon in 44 B.C and 27 B.C. with the rise of his son Octavian as the absolute dictator of Rome.
I’d argue the Norman Conquest of what is now England in 1066 A.D. is comparable to the beginning of the Etruscan Period. The period between the Magna Carta and the Hundred Years War is comparable to the rise of the Roman monarchy. The Cromwellian Revolution is comparable to the rise of the Roman Republic. And the emergence of the US as a unipolar global hegemon in the post-WW2 era is comparable to the beginning of the Roman Empire.