The Battle of Fombio was fought between the French Army of Italy led by Napoleon Bonaparte and the Austrian army under Feldzeugmeister Johann Peter Beaulieu between 7 and 9 May 1796. It was the decisive strategic point of the campaign, as Bonaparte crossed the Po River at Piacenza in Beaulieu's rear, threatening both Milan and the Austrian line of communications. This threat forced the Austrian army to withdraw to the east.

Johann Peter de Beaulieu, also Jean Pierre de Beaulieu, was a Walloon military officer. He joined the Habsburg army and fought against the Prussians during the Seven Years' War. A cultured man, he later battled Belgian rebels and earned promotion to general officer. During the French Revolutionary Wars he fought against the First French Republic and attained high command. In 1796, a young Napoleon Bonaparte won some of his first victories against an army led by Beaulieu. He retired and was the Proprietor (Inhaber) of an Austrian infantry regiment until his death.