How did invading forces contribute to the fall of the Byzantine empire?

Invading forces contribute to the fall of the Byzantine empire by weakening the empire. ... The Byzantines created another barbarian group, called the Avars, to stop the Slavs. As the two groups were at war with each other, they were physically weakening the empire's structure.

Explanation:

that was the type of government the spanish colonists were used to.

we can argue that appeasement caused world war ii because it allowed hitler and the nazis to build germany’s military power until it was strong enough to fight a major war. additionally, appeasement emboldened germany, making it think the allies would never have the will to fight. this made germany much more aggressive and encouraged it to take the steps that eventually led to war.