After the Byzantine Emperor Basil II died, many unskilled Emperors came to the throne. They wasted the money of the Empire and reduced its army. This meant that it could not defend itself well against enemies if they would attack. Later, the Byzantines relied on mercenaries, soldiers who fought for money and not for their country, so they were less loyal and reliable and more expensive. Because they had mercenaries, military generals were able to rise to power and grab it from the elaborate bureaucracy, a system of administration where tasks are divided by departments.