Count Claudius Florimund de Mercy (1666 – 29 June 1734) was an Imperial field marshal, born at Longwy in Lorraine, now in France.

For five years more, up to 1697, he was employed in the Italian campaigns, then he was called back to Hungary by Prince Eugene of Savoy and won on the field of the Battle of Zenta two grades of promotion.

[1] De Mercy displayed great daring in the first campaigns of the Spanish Succession War in Italy, twice fell into the hands of the enemy in rights at close quarters and for his conduct at the surprise of Cremona (31 January 1702) received the thanks of Leopold I, Holy Roman Emperor and the proprietary colonelcy of a newly raised cuirassier regiment.

[1] At the great Battle of Belgrade (1717) he led the second line of left wing cavalry in a brilliant and decisive charge which drove the forces of the Ottoman Empire to their trenches.

But before his work was done he was once more called away to a command in the field, this time in southern Italy, where he fought the Battle of Francavilla (20 June 1719), took Messina and besieged Palermo.