Prince Harry has hailed a new partnership between his Royal Foundation and the Ministry of Defence which aims to place "mental fitness" at the heart of the Armed Forces' training and support.
He said servicemen and women were "prized assets" who need to be continually invested in, and should be thought of as high-performance athletes carrying a kit and a rifle.
The former Army officer, who spent 10 years in the forces, said during his time as a soldier physical conditioning was important, with troops warming up before a run or a loaded march, and the same approach should be applied to mental health for servicemen and women.
Speaking at the project's launch, staged at the MoD in central London, Harry told invited guests including Defence Secretary Sir Michael Fallon:
"The military has faced the challenge of dealing with things like post-traumatic stress, anxiety and depression.
"But, like many of you in this room, I have come to realise that we can all do more to promote the positive management of our mental health and, in doing so, help prevent some of these issues before they develop.
"This is what the partnership between the MoD and the Royal Foundation is all about - placing mental fitness and mental health at the heart of the training and support provided to the entire defence community."
The joint initiative between the MoD and the Royal Foundation of the Duke and Duchess of Cambridge and Prince Harry comes days after the foundation announced it will invest £2 million for the creation of a start-up company providing digital support to youngsters concerned about their mental well-being.
The partnership is the latest in a series of royal efforts to promote greater understanding and openness around mental health through the work of the foundation's Heads Together campaign, launched in May last year.
The MoD said the move will build upon a recently-launched government strategy aimed at improving mental health in current military workers, civilian staff, their families and veterans.
The foundation will now offer advice and resources to improve training, education and information sharing for the Armed Forces.