Ottoman Turks conquering, the military system, and division
Explanation:
Justinian plague is said to have been caused by a rat bite, which killed 5,000 people in a single day. This killed half of his rule, making it easier for the armies to defeat their empire.
The barbaric attacks increased as many people died from the plague and the barbarians attacked from many places.
The Crusades were Christian warriors who tried to fight the Turks and Jews. The Byzantines were part of the Crusade, defeated by the Muslims.
Different families fought for power and many disagreements led to the decline of the government.
even though they were part of the same country , the north and the south were very different .... they built factories and manufactured products to sell to other countries and to the southern states . they did not do a lot of farming because the soil was rocky and the colder climate made for a shorter growing season