According to a new ITV documentary, "The Real Crown: Inside the House of Windsor," perhaps a further example of the "heir and reserve" dynamic, Queen Elizabeth wanted both Prince William and Prince Harry to serve in the war but decided that it was "too much of a risk" for Prince William. Harry, on the other hand, served two tours in Afghanistan. [Sir Mike Jackson, a former British Army officer, recalled a conversation the Queen had with him about the two. The Queen is very wise. The Queen is very wise, and she used to tell my staff to see if they could get a lunchtime slot, and after 30 or 40 minutes she would ring a little bell and say, 'It's time for Shelley, CGS'"

.

He continued. 'What goes on in such an audience and who says what to whom remains for the two people involved. My grandchildren took my shilling. That was the end of it."

Jackson added that since William was then second in line to the throne, the risk of his going to the front was deemed "too great."

According to People, William spent more than seven years in full-time military service. He spent three years as a search and rescue helicopter pilot before retraining as a pilot with the East Anglian Air Ambulance.

Harry graduated from the Royal Military Academy Sandhurst and served in the British Army for 10 years. He rose to the rank of captain and was deployed twice to Afghanistan, where he completed elite training to fly Apache helicopters. Harry told People magazine, "I will never be able to fully reconcile the painful elements of being in a war. In nearly two decades of working alongside military personnel and veterans, I have heard their stories and shared mine." In these conversations, we often talk about the parts of our mission that haunt us, such as lives lost or taken. But at the same time, we also talk about the parts that heal us and the lives we have saved. [Having been deployed twice to Afghanistan for my country, I have done everything I can to be the best trained soldier I can be. There is no right or wrong way to deal with these emotions, but I know from my own healing journey that silence is the least effective treatment. Expressing and detailing my experiences is the coping method I have chosen in the hopes that it will help others."

"The Real Crown: Inside the Windsors" will be released on April 20.