They didn't serve together and they're still fighting their own battles, but Matthew Blunt and Matthew Brumby are brothers in arms on the Invictus Games wheelchair rugby court.
The debutants are among 72 men and women chosen to represent Australia at the multi-sport event for wounded former and serving military personnel, created by Prince Harry, to be held in Sydney from October 20.
Defence Minister Marise Payne, Veterans' Affairs Minister Darren Chester and Defence Force chief Air Chief Marshal Mark Binskin announced the team on the steps of the Opera House on Friday.
Mr Brumby joined the Navy at 16 and was discharged in 2001.
He was left paralysed from the chest down, stemming from spinal injuries suffered during a diving course and subsequent motorbike accident.
But the 40-year-old Tasmanian said "everybody has to deal with something".
"When I came to Invictus and I met all these other athletes, not only do they have physical trauma, they have a lot of mental trauma," he told AAP.
Mr Brumby's optimism proved a magnet at rugby training for Mr Blunt.
He joined the Defence Force in 1994, serving for the Army in Timor Leste and Malaysia where he saw "horrendous" scenes, including during tsunami clean-up efforts.
"Matty's got this really happy personality ... there are always fist bumps, high-fives and really good, positive talk," he said.
The 42-year-old injured his back during a vehicle rollover at training and suffers post-traumatic stress disorder.
His pet dog Bella has since been trained as his service companion to boost his confidence and sense of safety.
Mr Blunt said he'll be "making a beeline" at the games for Prince Harry - who created the Paralympic-style event in 2014 after serving twice in Afghanistan - and his new wife, Meghan, the Duchess of Sussex.
At Friday's announcement, Mr Chester encouraged athletes to be proud of what they're doing.
"You've already served Australia once in uniform - in the navy, the army or the air force - and now you're going to represent us again," he said.
More than 500 athletes from 18 nations will compete in archery, athletics, indoor rowing, powerlifting, road cycling, sailing, sitting volleyball, swimming, wheelchair basketball, wheelchair rugby and a driving challenge during the one-week event.