Prince Harry was proud to serve in the military for his country and left a moving note for fallen soldiers during an emotional visit to Los Angeles National Cemetery.
The father-of-one, accompanied by his wife Meghan Markle, laid a wreath on Remembrance Sunday, with their gesture captured by their personal photographer.
Harry, who served in the Army for 10 years, left fans moved as he laid the tribute along with a personal note to his fallen comrades.
Meghan, dressed in black, had also picked flowers from the garden of their home, which they share with baby son, Archie, to be laid on the grave.
The Duke, who served as Captain Wales in the British Army, laid a wreath at an obelisk in the cemetery inscribed with the words: "In Memory of the Men Who Offered Their Lives in Defense of Their Country".
On it, he had written: "To all those who have served, and are serving. Thank you."
However, while some have praised the Duke of Sussex's poignant tribute, others have criticised the couple, who stepped down from the royal family earlier this year, of a "PR stunt".
Psychologist and body langauge expert, Bruce Durham, believes Harry was clearly moved by the visit to the cemetery but reveals some hidden signs the photos show.
He explained: "In the first photo, they're wearing masks with no one else around but have removed them for the rest of the pictures.
"There's no harm in it being for PR, but we need to acknowledge this rather than pretend it wasn't. Meghan does seem to be along for the ride and what I mean by that, and it may be no fault of her own, is that you can see the visit impacts Harry much more than Meghan."
Bruce says the second photo shows Harry is "deep in thought" with his head bowed and his eyebrows furrowed.
He explained: "This is a clear sign that a part of the brain called the hippocampus is engaged here as he is recalling his own emotional military memories and experiences while looking at the graves - this is etched on his face.??
"Compare this with Meghan's slight head 'bewilderment tilt' - she has no experience of this so, naturally, she is looking at this experience unable to relate to it, which is why the head is tilted.
"She is more curious than in tune with the event. Again, this is not a negative, more what any wife may feel if accompanying her military partner to such an event."
However, it's the two images of the royal couple standing before the wreath and then on the grass that really grabbed Bruce's attention.
He explained: "If you look at the photo if you look at the two of them standing before the wreath - just look at how thin Meghan's heels are.
"Then switch to the photo of them in the middle of a huge grass field - you know for a fact those heels are going to be causing chaos the moment she steps on the grass so she has killed herself trying to get into that position so far into the field for that shot.
"Again in that photo you see Harry explaining something specific as his finger is pointing out, her head tilt is present again displaying a lack of understanding (again, not a bad thing, she hasn't served).
"For me, it's an emotional event for Harry. It means something to him, he served for 10 years. For Meghan, she could be filling her role as the supportive partner but the only thing I would question - those heels.
"You simply could not get into the middle of a grass field without those heels going in the turf so as every other woman globally would know - she has put a HUGE amount of effort in to get that picture - just look at the amount of grass she has covered to get there."
The couple laid flowers on the grave of a man who had served in the Royal Canadian Artillery and placed another tribute on a grave of a member of the Royal Australian Air Force.
They wore face masks to the cemetery, only removing them when they were alone.
The Duke also wore a number of medals, including his Queen's Golden Jubilee medal, 2002, his 2008 Afghanistan Operational Service medal and his Queen's Diamond Jubilee medal from 2012.
Good Morning Britain's Piers Morgan is among the people who have criticised the couple for their decision to share photos from their trip to the cemetery.
He slammed the couple for hiring a photographer, calling it a "distasteful PR stunt" that "stuck in his gullet".
His co-host Susanna Reid asked: "Why wouldn't he want to show his respect when he has such a strong connection?"
There were reports that Harry had? asked if a wreath ?could be laid on his behalf at the Cenotaph service, but was refused.
Harry, who served for 10 years in the military, including two tours of Afghanistan, first laid a wreath at the Cenotaph in 2009 when he was 25.
According to the Times, Harry is believed to be "deeply saddened" by the refusal, although the Queen was reportedly not made aware of her grandson's request.