trigger point

noun

An event, arrangement, provocation, etc. that leads a certain, generally violent or angered, action to be taken.

The argument was the trigger point for their breakup.

意味（1）

An event, arrangement, provocation, etc. that leads a certain, generally violent or angered, action to be taken.

The unbalanced terms of the treaty was a trigger point for the war.

意味（2）