He was distracted by foreign wars with France and the Ottoman Turks, and the spanish. He left the empire in charge of Ferdinand his brother who was incompetent and lacked moral authority to lead (hadn't been elected)
Also lutheranism was left to itself and established itself, where some people had grown up not knowing any different.
The Persian empire.
The collapse of the sumerian empire happened because the code of laws were expected to pass down to civilization to civilization(Sumerian to babyloin).
They became failed romans.
The Ghana Empire failed because the king spent all of his money and just kept it all to himself.
The Persian Empire failed by never taking over Greece.
They failed companiangs in the 1330's
octavian
He failed and forgot to conquer England
serbia
It failed because the plan to kill Hitler failed, but also because there were too many people to control in his empire. That is, the "rebellion" could not contain all of the necessary people from bring word of Hitler's survival. Once the government found out he was alive, the plan quickly unravelled.
Octavian
octavian