Cancelling a peace treaty is essentially a declaration of war, no?
In this case, absolutely.
Actually, in all cases where the 'peace treaty' was signed by a vanquished in order to end a war; in essence that treaty is 'terms of surrender'.
Different - when a peace treaty 'expires' - as the terms in the peace treaty 'expired' between the United States and Japan several years ago. Those were actually 'terms of surrender'. Not sure the 'treaty' itself 'expired' - don't think it did.

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