Officers in Chippenham are investigating a disorder which occurred in the Pewsham area earlier this month.
At approximately 11.30pm on July 5, police received a report of a large number of people fighting outside the Old Lane pub, in Lodge Road.
During the incident, a 20-year-old man from Calne sustained injuries to his jaw, teeth and ear, which required reconstruction surgery at the John Radcliffe Hospital.
A second man also attended hospital with concussion.
Det Con Lauren Barnard, of Central CID, said: "A large number of people were involved in this disorder and we know several were injured.
"We are keen to hear from anyone who may have information in relation to this incident, and anyone who was involved who has not yet spoken to police."
Call 101 and quote crime reference number 54190065523.
Alternatively, call Crimestoppers anonymously on 0800 555 111.