The Japanese invasion of China can be traced back to the Sino-Japanese War (1894) at the end of the 19th century, followed by a gradual increase in the number of Japanese troops stationed in northeastern China. Here are a few important events and excuses for the Japanese army to enter China:
1.First Sino-Japanese War (1894): The First Sino-Japanese War was a war between Japan and the Qing Dynasty in which Japan attacked China in the name of protecting Korea, eventually winning and ceding Taiwan and the Penghu Islands through the Treaty of Shimonoseki.
2.Invasion of the Eight-Nation Coalition (1900): In 1900, the Eight-Nation Coalition invaded China, and Japan was the country that sent the most troops. After the defeat of the Qing Dynasty, the Treaty of Xinchou was signed with the Eight-Nation Alliance, through which Japan obtained the right to garrison troops in Beijing and Tianjin.
3.Direct Occupation of Chinese Territory: The gradual increase in the number of Japanese troops stationed in Northeast China eventually led to the direct Japanese occupation of China. For example, in 1931, Japan launched the "918 Incident", occupied Liaoning Province in northeastern China, and established the puppet state of Manchukuo. Since then, Japan has successively invaded other parts of China, such as northern, central, and southern China.
4.Excuses and Interference: In the process of entering China, Japan often intervened under various pretexts. For example, Japan has repeatedly intervened militarily and invaded China under the pretext of protecting Japanese and economic interests. In addition, Japan has also taken advantage of China's internal political turmoil and ** to intensify its aggression against China.
In general, the process of Japanese troops entering China was a gradual process, starting with the First Sino-Japanese War, through wars, treaties, and direct occupations, which eventually led to full-scale aggression against China.