Micholaj Machalski, 17, of Harford Street, Trowbridge, was sentenced to six years and four months in a youth detention facility after previously pleading guilty to grievous bodily harm with intent, robbery and possession of a bladed weapon.
Ethan Bush, 18, of Chesterfield Road, in Mansfield, was jailed for five years after previously pleading guilty to armed robbery with a knife.
Korben Edwards, 18, of Eagle Park, Trowbridge, was jailed for 47 months after previously pleading guilty to robbery.
All three were sentenced Friday during a hearing at Swindon Crown Court.
The incident happened on the night of 13 February 2019 when the two victims, men in their 20s, had arranged to meet the three defendants in Biss Meadows to sell them drugs.
However, the meeting had actually been arranged with the intention of robbing the victims of their money and drugs.
During the robbery, which happened on the bridge between Biss Meadows and the Tesco supermarket in County Way, both victims were stabbed.
No charges were brought in relation to the drug dealing aspect of the case, due to a lack of evidence.
Temporary Detective Sergeant Ted Roe, from Central CID, said: “We welcome today’s sentence and we hope it reassures the community in Trowbridge that the police are committed to tackling knife crime.
“I know incidents of this nature are concerning for local people, but we will carry out detailed and thorough investigations and make sure offenders are brought before the courts to be dealt with by the justice system.
“Both victims in this case have gone on to make good physical recoveries to their injuries, but the psychological impact of what has happened to them will obviously take much longer to heal.”
He added: “Thankfully, knife crime incidents in the town are rare, and, as this case shows, are usually linked to wider criminality such as drug dealing, rather than being random attacks on members of the public.
“However, any stabbing is one too many, and we are working hard to engage with young people to show them the dangers of carrying a knife and the potentially consequences of becoming involved in this type of illegal and risky behaviour.”
