1915年1月,日本政府向中国政府提出灭亡中国、变中国为其独占殖民地的《二十一条》,遭到全国人民的反对。5月7日,日本政府向中国政府发出最后通牒,限48小时完全应允,否则“将执认为必要之手段”。与此同时,日本政府颁布关东戒严令,命令驻山东和奉天日军备战;日商纷纷回国,日舰队游弋于渤海,大有战争一触即发之势。 In January 1915, the Japanese government submitted to the Chinese government the “Article 21” which perished in China and turned China into its exclusive colony. It was opposed by the people throughout the country. On May 7, the Japanese government issued its ultimatum to the Chinese government and was allowed 48 hours to fully answer it. Otherwise, “it will be recognized as a necessary means.” In the meantime, the Japanese government issued the martial law on the Kanto zone and ordered the Japanese troops in Shandong and Fengtian to prepare for the war. Japanese businessmen and Japanese businessmen each returned to China in succession. The Japanese fleet cruised the Bohai Sea and the war was at an instant.