the final argument of kings (a resort to arms): motto engraved on the cannon of Louis XIV.
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How to use ultima ratio regum in a sentence
Without consuming, like the ultima ratio regum, it winds its progress from nation to nation, and conquers by a silent operation.The Writings of Thomas Paine, Volume II | Thomas Paine
On one was, ultima ratio regum; on others, the darling libert, egalit.Travels Through North America, v. 1-2 | Berhard Saxe-Weimar Eisenach