Prince Harry says the Invictus Games are about supporting the individuals taking part and not the war.
Some 400 wounded service personnel from 13 countries are taking part in the Games, an international sporting event for wounded, injured and sick Servicemen and women.
Harry has championed the Games with the Duke and Duchess of Cambridge also supporting them.
Prince Harry has said he feels 'young at heart' ahead of turning 30 on September 15.
Speaking after presenting medals at the Invictus Games, he said: 'I'm slowly starting to feel old. I think 30 is one of those first milestones when you drive through a village and see the 30mph sign. It's that constant reminder going 'I am actually quite old'.
'But I don't feel too old. I think i'm always young at heart', the Prince added.
A new wax model of Prince Harry has gone on display at Madame Tussauds in London to celebrate his 30th birthday.
The new figure shows the Prince in combat uniform to reflect his job as a captain in the Army Air Corps.
The figure cost £150,000 and took a team of sculptors and artists four months to create.
The countdown to the Invictus Games begins later today when Prince Harry welcomes team captains from across the globe to London.
The competition for wounded servicemen and women, both serving and veterans, has attracted 12 foreign teams and a UK contingent who will compete in the four-day event, which begins on Thursday.
The Games will also be supported by Harry's immediate family with the Prince of Wales, Duchess of Cornwall and the Duke and Duchess of Cambridge attending heats and matches in the run up to the main event.
More than 400 competitors will go head-to-head in nine adaptive sports at the Queen Elizabeth Olympic Park and Lee Valley Athletics Centre in London.
Prince Harry's speech to introduce Team GB's athletes for the Invictus Games did not quite go according to plan.
Firstly, his notes blew away and then a vocal canine decided he wanted some of the limelight too.
The Invictus Games is an international Paralympic-style event for wounded soldiers.
The Games are being held in London 10-14 September.
"To see young lads — much younger than me — wrapped in plastic and missing limbs.......was something I never prepared myself for."Read the full story ›
The medals and medallions, which will be given to each of the 400 participants of the Paralympic-style Invictus Games, have been unveiled.Read the full story ›
The Duke and Duchess of Cambridge were joined by Prince Harry as they met the families of soldiers who fought in the First World War.
Prince Harry will today unveil a memorial arch in Kent, where many soldiers took their last steps on British soil, to mark the centenary of the First World War.
The prince will also lay a wreath at the event, organised by educational charity Step Short, which was set up to remember the millions of men and women involved in the First World War.
He will then take the salute of a military and civilian parade before walking down the Road of Remembrance, a Kensington Palace spokesman said.
The memorial will take place in Folkestone in Kent, which played an integral part in the Great War as the port to and from the Western Front for millions of men and women.
The spokesman added: "For many it was their last time on British soil before heading to the battlefields of France and Belgium."
After learning of their shared love of chicken nuggets, Prince Harry cheekily asked the Olympic champion Usain Bolt whether he worked out.Read the full story ›