1796, Napoleon led more than 30,000 people, crossed the famous "natural barrier" in the alpine coastal mountainous areas, made a breakthrough among the allied forces in Ossa, and successively won the battles in Montnott, Rotti, Leonet, castel, Akelet and Rivoli, forcing Austria to sign the Campo Formio Peace Treaty in 1797, thus promoting the Italian war for more than a year. The French army captured the enemy10.5 million people. It seized many areas from Austria and ruled northern Italy, making the slogan and system of "freedom and equality" popular in the Italian peninsula.