事変

Etymology
From.

First attested in , written around 1220.

Noun

 * 1) severe or extraordinary incident, such as a natural disaster or a riot
 * 2)  conflict, especially an undeclared war
 * 3) severe disturbance that cannot be quelled using the police anymore and requires military deployment
 * 1) severe disturbance that cannot be quelled using the police anymore and requires military deployment
 * 1) severe disturbance that cannot be quelled using the police anymore and requires military deployment