Well, it started with the death of Yaroslav. But then the kingdom was divided among his sons. The sons then fought for control of the whole territory, one of the three sons killing the other two (who became martyrs) Then the Crusades between the Christians and the Muslims disrupted trade, hurting the economy. And Lastly, the invasion of the Mongols. Hope it Helped :-)
it got atacked by outside invaders named the Goths and were overthrone by them causing Kiev to decline
One factor was that they had a very weak military.
Economis decline is what caused the naval superiority to decline then
rise of regional centres played a great role, and hatred of families.
rise of regional centres played a great role, and hatred of families.
The decline of Zimbabwe was from poor management and political corruption,
nobody knows
The Crusades caused many nobles and knights to leave their land which caused feudalism to decline. Because of the decline in feudalism, many kings took the opprotunity to come to power and create a kingdom.
The loss of serfs on the manor.
because of religons
black people
br />It caused them decline because there was so many killed