I think it’s one but I’m not sure
This answer sums it up well, you will have to start a free trial be able to view it
https://www.enotes.com/homework-help/how-were-industrializations-britain-united-states-349364
Answer: the Byzantines were defeated by the Normans during their conquest of Italy, thereby driving the Byzantines from southern Italy. Even more dangerous than the Normans was a new enemy from the steppe: the Turks.
