Which war began as a religious war but ended as a political war and is often considered the last of the religious wars of Europe?

Question

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The Thirty Years' War (1618-1648) began as a conflict between Catholic and Protestant states in the fragmented Holy Roman Empire but evolved into a more general conflict involving most of the great powers of Europe, thus ending more as a political struggle for European dominance.

Which War Began as a Religious War but Ended as a Political