Kent Police responded to reports of fighting outside an address in Bargrove Road at around 9.30pm on Sunday 30 June 2024.
A 17-year-old boy was taken to hospital with an injury consistent with a stab wound and remains in a serious but stable condition.
Derrick Okoh, 18, of Brown Street, Gillingham, has since been charged with violent disorder and possession of an offensive weapon (a glass bottle).
Ezekiel Barnes-Naseno, 18, of Abbey Drive, Dartford, has been charged with the same offences but is alleged to have been in possession of a knife.
Both men have been remanded in custody and were due to appear at Medway Magistrates’ Court on Thursday 4 July.
An 18-year-old woman from London was arrested on suspicion of assisting offenders and has been released on bail pending further enquiries.