As the Duke of Cambridge begins training next month as an air ambulance helicopter pilot, before taking up a full time role next year, we take look back through the history of his military career.
Prince William graduated at the University Of St Andrews in Scotland on June 15.
He received his 2:1 Master Of Arts Degree in geography at the university where he first met the Duchess Of Cambridge.
After passing his Regular Commissions Board in October 2005, the Prince endured 44 weeks of Army Officer training with the Sandhurst Royal Military Academy in Camberley, Surrey.
During his training he was known as Officer Cadet Wales.
His Royal Highness graduated from the Royal Military Academy Sandhurst, known as passing out, on December 15.
He took part in the Sovereign's Parade which was presided over by his grandmother the Queen, who was accompanied by The Duke of Edinburgh.
After completing his training, William was commissioned as an officer in the Household Cavalry and soon after was promoted to Second Lieutenant.
Prince William then went on to receive his RAF wings from his father Prince Charles at RAF Cranwell, after completing an intense 12-week flying training course.
The Duke became the fourth successive generation of the monarchy to become an RAF pilot.
In October, Prince William was appointed Honorary Air Commandant of Royal Air Force Coningsby by his grandmother The Queen, in recognition of the strong links between the Royal Air Force and the Royal Family.
The Duke of Cambridge began training in January to become a Search and Rescue pilot.
Both Princes William and Harry were based at the home of the Defence Helicopter Flying School as they underwent military helicopter training courses.
William trained to become an RAF Search and Rescue pilot, while his brother Harry aimed to become a pilot with the Army Air Corps.
In January, His Royal Highness successfully completed a 12 month course in advanced helicopter flying training at the Defence Helicopter Flying School based at RAF Shawbury.
The Duke of Cambridge joined C Flight, 22 Squadron as a Search and Rescue pilot at RAF Valley in Anglesey, north Wales, in September,
In February, Flight Lieutenant Wales began a six-week operational deployment in the Falkland Islands.
He undertook Search and Rescue duties as part of a four man crew, providing cover for the aviation assets based on the island as well as offering assistance to shipping vessels and those in need of mountain rescue.
On June 7, Prince William qualified as an operational captain within the Search and Rescue Force.
The Duke of Cambridge left operational service in the Armed Forces in September.
During his time at RAF Valley, The Duke undertook a total of 156 search and rescue operations, resulting in 149 people being rescued, and since joining the Royal Air Force he completed over 1,300 flying hours.
The Duke of Cambridge is due to begin his training as an air ambulance pilot next month, before taking up a full time role next year, Kensington Palace has confirmed.
He will undergo a civilian pilot course followed by dedicated 999-response training.
If successful he will join the East Anglian Air Ambulance based at Cambridge Airport in spring next year.