Prince Harry has spoke of the importance of "recognising the sacrifice" made by soldiers across the world.
The 32-year-old royal - who himself served in the Army in the past - has urged for people to take notice and realise the huge "debt" we owe the armed services for their work in protecting the country.
Speaking about the Walking With The Wounded expedition, he told GQ magazine: "This extraordinary expedition will raise awareness of the debt that this country owes to those it sends off to fight - only for them to return wounded and scarred, physically and emotionally.
"The debt extends beyond immediate medical care and short-term rehabilitation. These men and women have given so much. We must recognise their sacrifice, be thankful, so far as we can ever repay them for it."
Meanwhile, Prince Harry - who is the youngest son of Prince Charles - previously admitted he felt guilty about leaving the Army.
He said: "I could no longer stay with my soldiers, as it would have put them at greater risk. It was a decision over which I had no control. But the guilt of having to leave my guys behind was something I had to swallow.
"Four years later I made it back to Afghanistan as an Apache helicopter pilot. Again, I was reminded of the human impact of conflict as I protected medical teams evacuating soldiers from the battlefield.
"On other occasions I sat at the controls of one of the world's most advanced helicopters and was powerless to protect men, women and children below. On returning home, I began to look for ways to support veterans with injuries."