1931年9月18日前侵入中国大陆的日军地面部队有:1901年《辛丑条约》后驻扎京榆铁路要地的中国驻屯军,1905年《中日会议东三省事宜条约》后驻扎关东租借地及南满铁路沿线的关东军,1927年8月以保护租界为名驻扎上海的海军上海陆战队。1931年9月18日,此时中国一级行政建制有辽宁、吉林、黑龙江、河北、山西、热河、察哈尔、绥远、河南、山东、江苏、安徽、浙江、江西、福建、广东、广 The Japanese ground troops that intruded into mainland China before September 18, 1931 include the stationed Chinese forces stationed at the site of the Jingyu Railway since the “Xinchu Treaty” in 1901, the stationing of leased land in the Kanto region after the “Treaties on the Three East Provinces of the Sino-Japanese Conference” in 1905, The Kwantung Army along the South Manchurian Railway was stationed in Shanghai’s Navy Shanghai Corps in August 1927 under the pretext of protecting the concession. September 18, 1931, at this time China’s first-level administrative system has Liaoning, Jilin, Heilongjiang, Hebei, Shanxi, Rehe, Chahar, Suiyuan, Henan, Shandong, Jiangsu, Anhui, Zhejiang, Jiangxi, Fujian, Guangdong ,wide