 The Battle of the Sesia (April 30, 1524) was a battle in the Italian War of 1521–26 fought near the Sesia River that saw the Spanish-Imperial forces under Charles de Lannoy inflict a decisive defeat on the French under Admiral Bonnivet and the Francis de Bourbon, Comte de St. Pol, forcing the latter to withdraw from Lombardy.The Siege of Marseille (August–September 1524) was conducted by an Imperial army under Charles de Bourbon (who had recently betrayed Francis I) and Fernando de Avalos against the French defenders of Marseille.Although Avalos heavily looted the surrounding countryside, he was unsuccessful in seizing the city; and, faced with the arrival of French reinforcements, called off the siege in September.