A drugs gang responsible for "devastation and despair" peddled misery from safe houses set up in homes where children lived.
The crew sold heroin and crack cocaine to addicts across Cumbria as part of an illicit campaign that saw them exploit vulnerable families.
The network, controlled by Dovecot man Roy Hickman, was run from Liverpool.
Carlisle Crown Court heard the gang advertised their enterprise by sending out "text bombs" to addicts on their customer lists.
Run from Merseyside, the plot was described as a County Lines operation - when drug dealers control sales in a different town or city through the use of mobile phones, safe houses and ruthless exploitation.
Tactics included using addicts' homes to store drugs and cuckooing - placing dealers in the houses of vulnerable people to work on the ground for gang leaders.
Sentencing the gang, Judge Peter Davies said the conspiracy had caused "devastation, despair and a huge financial and social cost this county [of Cumbria] cannot afford".
Thirteen people had admitted conspiracy to supply Class A drugs, while three others were found guilty following a trial.
Ten from Cumbria were jailed, as were the plot leaders from Merseyside and Skelmersdale.
They were:
Roy Hickman, 35, of Churchdown Road, Dovecot -14 years, five months
Thomas Wright, 25, of Harefield Road, Speke - 10-and-a-half years
Christopher Westwell, 25, of Round Hey, Stockbridge Village - nine years, nine months
Dylan Yates, 25, of Boode Croft, Stockbridge Village - 12-and-a-half years
James Bailey, 20, of Birkrig, Digmoor, Skelmersdale - nine years
