九一八事变

jiǔ yī bā shì biànjiuyibashibian

1. the Mukden or Manchurian Railway Incident of 18th September 1931 used by the Japanese as a pretext to annex Manchuria
2. also known as Liutiaogou incident 柳條溝事變|柳条沟事变

Study it in Yanamino