Originally referred to rapid military gunfire, so it's often used in war or action contexts.

Military Origin

Implies an intense, overwhelming number of shots fired to suppress the enemy quickly.

Intensity

Used when shots or missiles are fired rapidly one after another, not sporadically.

Beyond literal gunfire, it's used metaphorically for a lot of criticism or questions.

A fusillade of criticism suggests a confrontational, aggressive situation.

Used to describe a barrage of words that's overwhelming and hard for the recipient to manage.