柳条湖事件

liǔ tiáo hú shì jiànliutiaohushijian

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 9-18 incident 九一八事變|九一八事变[Jiu3 Yi1 ba1 Shi4 bian4]

Study it in Yanamino