In the Montenotte Campaign, the French won victories at Montenotte, Millesimo and Dego between 11 and 15 April. In the Battle of Ceva Colli's Sardinians repelled Augereau's attack but they retreated to the west when Sérurier's division appeared. Colli detailed Jean-Gaspard Dichat de Toisinge with 8,000 Sardinians and 15 guns to defend San Michele Mondovi against a French attack. On 19 April, Sérurier formed his division into two 3,000-man brigades under Pascal Antoine Fiorella and Jean Joseph Guieu plus a reserve under his personal command. The Corsaglia River was unfordable due to the spring thaw and the French attack soon stalled. However, some of Guieu's skirmishers found an unguarded footbridge and made a lodgement on the west bank. The French captured San Michele but the unpaid, hungry soldiers went on a looting spree. Led by a company of Swiss troops, Colli organized a counterattack which drove Sérurier's division out of the town, though Guieu's brigade maintained its bridgehead. The repulse cost the French about 600 casualties while the Sardinians lost 300.