restoration of public order
Refers to the process or state of bringing back safety and order to a community or area after a period of unrest or crime.
The government increased the number of police officers to restore public order.
It will take time to restore public order in this area.
治安 means 'public order' or 'public safety' as a state; 治安回復 is the restoration of that state.
回復 means 'recovery' or 'restoration' in general; 治安回復 specifies recovery of public order.
Compound of 治安 (public order) and 回復 (restoration).