Chiang Kai-shek and Republic of China authorities deliberately ignored a tip from the French military in Indochina of the impending Japanese offensive. The Chinese military believed the tip to be a result of Japanese disinformation, since only 30,000 Japanese soldiers were involved in the first manoeuvre of Operation Ichi-Go. Since the Japanese force only crossed the Yellow river in Northern China, the Chinese believed that it was a small scale offensive. Another major factor was that the battlefront between China and Japan had remained static since 1940, and Chiang Kai-shek believed Japan was reluctant to break the stalemate. In Northern China, Japan had been content to merely support the puppet government of Wang Jingwei and exploit resources in occupied territories.