 In a series of rapid victories during the Montenotte Campaign, he knocked Piedmont out of the war in two weeks.The French then focused on the Austrians for the remainder of the war, the highlight of which became the protracted struggle for Mantua.The Austrians launched a series of offensives against the French to break the siege, but Napoleon defeated every relief effort, scoring victories at the battles of Castiglione, Bassano, Arcole, and Rivoli.