Eight people have been charged by police in connection with an investigation into human trafficking and modern slavery.
Five women and three men, all from Plymouth, have been charged with conspiracy to traffick persons into the UK for the purpose of labour exploitation and money laundering.
They will appear before Plymouth Magistrates' Court this morning, Devon and Cornwall Police said.
The accused are Lenka Cmejlova, 32, of Union Street, Jiri Sebelik, 37, of Union Street, Martin Tancos, 35, of Saltash Road, Katerina Kuriova, 35, of Saltash Road, Nela Dzurkova, 26, of Ford Park Road, Petr Tancos, 35, of Ford Park Road, Sandra Tancosova, 25, of Flora Court, and Ruzena Tancosova, 34, of Union Street.
They were arrested following a series of raids in Plymouth and Bodmin on Tuesday in which seven men believed to be Czech nationals were rescued.
Police said 13 children, thought to be linked to the suspects, were found at the addresses by police and social services and have been taken to a place of safety.
The force said the operation was the largest it had undertaken to tackle adult labour exploitation and modern slavery.
The National Crime Agency, Gangmasters Licensing Authority and Department of Work and Pensions were also involved in the raids.
The Czech men remain in the care of the Red Cross, Salvation Army and social care staff from Plymouth City Council.