A Barnsley soldier was knocked unconscious, stamped on and kicked in the face and head just hours after getting home.
The 28-year-old soldier, whose mum does not want him to be identified, was attacked outside his home in Barnsley town centre.
The corporal, who has served two tours of duty in Afghanistan and one in Iraq, had returned home that day from the Falkland Islands.
He was left with concussion, a broken nose, cuts and bruises.
A South Yorkshire Police spokesman said: “At 12.05am on June 30, police received reports of a disturbance. Officers believe a man was assaulted. One man was detained on suspicion of assault.
“The arrested person has been released without charge as South Yorkshire Police have not received a complaint.”