How did Charlemagne impact the Holy Roman Empire?

Among other things, he was responsible for uniting most of Europe under his rule by power of the sword, for helping to restore the Western Roman Empire and becoming its first emperor, and for facilitating a cultural and intellectual renaissance, the ramifications of which were felt in Europe for centuries afterward.

Explanation:

can i have brainiest?

He expanded its size

Explanation:

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.