the Mukden or Manchurian Railway Incident of 18th September 1931 used by the Japanese as a pretext to annex Manchuria; also known as Liutiaogou incident 柳條溝事變|柳条沟事变
Traditional 九一八事變
Meaning
JiǔYībāShìbiànjiu3 yi1 ba1 shi4 bian4
the Mukden or Manchurian Railway Incident of 18th September 1931 used by the Japanese as a pretext to annex Manchuria