unleash on

unleash someone or something (up)on someone or something

to turn someone or something loose on someone or something. (Upon is formal and less commonly used than on.) The air force unleashed a bombing attack upon the enemy. The mob chief unleashed his tough guys on Lefty.

Common Names:

Name	Pronounced	Usage
Baugulf	-	Ancient Germanic
Sajjad	-	Arabic
Carmella	kahr-MEL-ə	English
Zhihao	-	Chinese
Alva	['ælvə]
KristiĀNs	-	Latvian