What cause made feudal wars?

the central government of Europe collapsed. As the Vikings invaded western European kingdoms, local nobles took over the duty of raising armies and protecting their property. Power passed from kings to local lords, giving rise to a system known as feudalism.

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the correct answer is to reduce tax

after defeating german forces in north africa allied leaders turned their attention to "italy," since this was the location that made the most geographic sense before invading northern europe via france.