20世纪20年代末、30年代初,经济大萧条席卷全球,国土狭窄、资源匮乏的日本更显脆弱,陷入空前的困境中。明治时代的“大陆政策”又找到了畅销市场,在这个帝国的眼里,占领中国东北是摆脱危机的妙策。1930年冬,日本参谋本部草拟了《昭和六年形势判断》,主张分三个阶段吞并满蒙。1931年6月,日本陆军省制定了《解决满洲问题方策大纲》,计划在一年内对东北采取军事行动。7 In the late 1920s and early 1930s, the Great Depression swept the globe. Japan, with its narrow land and scarce resources, was even more vulnerable and caught in an unprecedented predicament. In the Meiji era, the “mainland policy” has found a best-selling market. In this imperial vision, the occupation of northeast China is a good way to get out of the crisis. In the winter of 1930, the Japan General Staff Headquarters drafted the “Judgment of the 6th Year of the Showa era” and advocated the annexation of Manchuria in three phases. In June 1931, the Japanese army established a “plan for a solution to the issue of Manchuria,” and plans to take military action against the northeast within a year. 7