Charlemagne was important in medieval europe because

He was crowned Emperor of the romans and encouraged the Carolingian Renaissance, a cultural and intellectual revival in Europe.

in 476 c.e. romulus, the last of the roman emperors in the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the roman empire had brought to western europe for 1000 years was no more.

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;