go into action

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go into action

To begin doing something or become active suddenly and very quickly. Firefighters need to be able to go into action at a moment's notice. If any movement is detected once this sensor is activated, the building's security measures will go into action.
See also: action, go

go into action

 and swing into action
to start doing something. I usually get to work at 7:45, get some coffee, and I go into action at 8:00. When the ball is hit in my direction, you should see me swing into action.
See also: action, go
References in periodicals archive ?
Soldiers hailed as have-a-go heroes are to receive bravery commendations for going into action against armed robbers who shot one of them in the back.
British tanks are going into action in Poland - 58 years after we declared war on Hitler following Germany's invasion of its eastern neighbour.
About 100 soldiers from 45 Commando, based at Arbroath, have just arrived to start acclimatisation and training before going into action.
GOING INTO ACTION: US helicopters carrying assault troops on deck on assault ship
Firemen could soon be going into action wearing freezer suits.
Before the ceasefire a warning that the IRA was going into action was enough to guarantee secrecy.