The Duke of Cambridge has ended his tour of Kuwait by watching British and local troops conduct drills on Exercise Desert Warrior.
Soldiers stormed a building during a simulation at Sheikh Salem Al-Ali National Guard Camp in the north of the country, close to the Iraqi border.
Prince William, himself an RAF pilot and Sandhurst graduate, watched Kuwaiti troops undergo urban warfare training - skills taught by UK soldiers.
Two Cyprus-based battalions, 2 Mercian and The Princess of Wales's Royal Regiment, are helping to train Kuwaiti troops there.
The personnel train alongside each other twice a year for four weeks, and this year is the 120th anniversary of the signing of the nations' Treaty of Friendship.
Major Ben Smyth, commander of Malta Company, 2nd Battalion, the Mercian Regiment, who hosted the Duke, said: "I explained to him at a company level our key outcome was wanting to improve that relationship and particularly build relations at a personal level.
"Defence is a small place and you can bump into each other again and again."
As Prince William departed, he was presented with commemorative plaques to mark his visit.
The next stop on the duke's tour of the Middle East is Oman, where he will spend time with the Royal Navy.