Which two empires ruled at the same time for a few years ?

Empire of Japan: minimum 1743 years to date (see above)

Byzantine Empire: 874 years (uninterrupted from 330 to 1204)

Holy Roman Empire: 844 years (962-1806)

Zhou Empire: 790 years (1046–256 BCE)

Ethiopian Empire: 666 years (1270-1936)

Khmer Empire: 629 years (802–1431)

I hope this helped :)

evaluate the extent to which the seven years' war (french and indian war, 1754–1763) marked a turning point in american relations with great britain, analyzing what changed and what stayed the same from the period before the war to the period after it.

the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism