Prince Harry promises to escape war in Afghanistan in his memoir, Spare

Prince Harry says in his forthcoming autobiography that he desired to leave the war in Afghanistan with his "conscience intact," according to a statement in The Telegraph, which read a copy of the book.

In his autobiography, Spare, the Duke of Sussex talked about his service in the military, especially his time flying Apache helicopters in Afghanistan.

"I made it my purpose, from day one, to never to go to bed with any doubt whether I had done the right thing...whether I had shot at Taliban and only Taliban, without civilians in the vicinity. I wanted to return to Great Britain with all my limbs, but more than that I wanted to get home with my conscience intact," Harry wrote, according to the outlet.

According to the story, Prince Harry says in his autobiography that he killed 25 people while fighting in Afghanistan.

With videos taken from the Apache helicopters and forwarded to the base, he was able to "say with exactness how many enemy combatants I had killed. And it seemed to me essential not to be afraid of that number," he wrote. "So my number is 25. It's not a number that fills me with satisfaction but not does it embarrass me."

According to reports, Prince Harry said in a letter that the victims he killed were just "chess pieces" to him.

Harry served a second tour of service in Afghanistan as a member of the British military. In 2007 and 2008, he began serving in the Helmand Province region, however, his service was cut short when a news organisation violated a news embargo regarding his military service. In 2012, he made a second trip.