After the Treaties of Westphalia, why did European monarchs begin to collect more taxes?

Question

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The Treaties of Westphalia brought an end to the Thirty Years' War and established the concept of the nation-state, which gave monarchs more power and control over their territories. To strengthen their power and protect their borders, monarchs needed larger and more efficient armies, which required more money. Therefore, they began to collect more taxes.

After the Treaties of Westphalia, Why Did European Monarchs Begin