Armand-Jacques Leroy de Saint-Arnaud was a French soldier and Marshal of France. He served as French Minister of War until the Crimean War when he became Commander-in-chief of the army of the East.

Marshal of France is a French military distinction, rather than a military rank, that is awarded to generals for exceptional achievements. The title has been awarded since 1185, though briefly abolished (1793–1804) and for a period dormant (1870–1916). It was one of the Great Officers of the Crown of France during the Ancien Régime and Bourbon Restoration, and one of the Grand Dignitaries of the Empire during the First French Empire.