It probably wouldn't conquer as much as Charlemagne (or he would conquer nothing at all) but it's unlikely this empire would collapse as fast as OTL without Louis the Pious, HRE probably doesn't form then.
It probably wouldn't conquer as much as Charlemagne (or he would conquer nothing at all) but it's unlikely this empire would collapse as fast as OTL without Louis the Pious, HRE probably doesn't form then.