crackdown
noun /ˈkrækdaʊn/
  /ˈkrækdaʊn/
 - crackdown (on somebody/something) severe action taken to limit the activities of criminals or of people opposed to the government or somebody in authority
- a military crackdown on student protesters
 - a crackdown on crime
 - The government has ordered a crackdown on truancy.
 - They’re having a crackdown on private phone calls from the office.
 
Oxford Collocations Dictionaryadjective- bloody
 - violent
 - major
 - …
 
- announce
 - promise
 - threaten
 - …
 
- crackdown on