go on the offensive
US /ɡoʊ ɑn ðɪ əˈfensɪv/
UK /ɡoʊ ɑn ðɪ əˈfensɪv/
1.
to start to attack or to act in a way that shows you are ready to attack
:
•
After a period of defense, the team decided to go on the offensive.
•
The politician decided to go on the offensive against his opponent's claims.