The victim of the first attack was 15 when she was raped three times in an underpass by the River Avon in Fordingbridge, during what she had thought was a first date.
She had travelled from her home to meet one of the boys for the first time after he had begun a “relationship” with her on social media platform Snapchat, but then two other boys appeared.
During the trial the court heard she was “petrified”, felt “cornered and trapped” and feared being thrown into the river.
The boys shared video of the attacks on social media, resulting in her receiving abusive messages, prosecutors said.
The second girl was 14 when she met the boys at Fordingbridge Recreation Ground, was threatened with a knife, then raped three times in a nearby field.
No knife was found, but forensic evidence revealed her leggings had been cut with a “sharp instrument”.
Video footage seen in court during the trial showed her lying motionless on the ground with “her face buried in her hands”, while another boy was heard shouting words of encouragement.
