Correct
九一八事变
/ jiǔ yībā shìbiàn /
Strokes
Definition
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 柳条沟事变
Example
As a Noun
September 18th Incident［the seizure of Shenyang in 1931 by the Japanese invaders, which marked the beginning of the War of Resistance Against Japanese Aggression］