In 1618, a long war began over religious conflicts and land disputes. What was the name of this war?

The Thirty Years' War was a 17th-century religious conflict fought primarily in central Europe. ... The war lasted from 1618 to 1648, starting as a battle among the Catholic and Protestant states that formed the Holy Roman Empire.

Thirty Years' War

Explanation:

The war lasted from 1618 to 1648, starting as a battle among the Catholic and Protestant states that formed the Holy Roman Empire.

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