Police arrested 38 people across Bath and north east Somerset in a day of action involving hundreds of officers from around the force area.
Operation Relentless saw teams act on tip-offs and police intelligence to target properties in the city, starting with a series of co-ordinated early morning raids.
Officers met at 6am on Tuesday at the Guildhall for a briefing with B&NES district commander Chief Superintendent Geoff Spicer, before dividing up and executing warrants at the homes of suspected criminals.
Many of the warrants were for drugs offences, particularly people police believed had been dealing drugs.
Chief Supt Spicer said that although this type of policing was part of their routine work, the extra resources through Relentless meant they could do everything on a larger scale.
He said: "We have shown that we will do what we can to keep the communities of Avon and Somerset and B&NES safe. Any criminal who thinks we are too busy or there are too few of us to pursue them, then they got a rude awakening this morning.
"We are relentless against those who commit crime, who damage our communities day-in, day-out, and today was just another opportunity to bring offenders to justice and keep people safe."
A raid was carried out on a flat in Linley Close, in Twerton, where a small amount of drugs and cash was recovered and a 31-year-old man arrested on suspicion of possession with intent to supply class A drugs.
He was released on police bail pending further inquiries.
More class A drugs were found at Bridewell Lane, in the city centre and a 40-year-old woman was arrested for possession with intent to supply.
There was also a warrant executed at a flat in Snow Hill, where officers discovered two cannabis plants, worth around £1,000 each, as well as hydroponics equipment for cultivating the crop.
A raid at a flat in Warwick Road, Keynsham, also resulted in officers finding cannabis and money and a 40-year-old man was arrested on suspicion of possession with intent to supply class B drugs.
Chief Inspector Alex Cohen, who was leading the team, admitted they had hoped to find larger amounts of drugs, but said the exercise had still been a success.
He said: "We did expect to find a little bit more than that, but when you are working with intelligence there is always that element of luck.
"We are here because we thought we were going to find more than that, but this still sends out a strong message to drug dealers and also a message to the public."
During the morning, there was also a mock-up of a car accident in Kingsmead Square, Bath so police could demonstrate how they deal with such emergencies.
Across the Avon and Somerset force area police arrested more than 250 people, in what was one of the biggest operations of its kind in this part of the country.
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