Prince Harry spoke to guests about how he could relate to the experiences of veterans after listening to speakers at a mental health conference for ex-servicemen in London.
The Duke, who served two tours of Afghanistan, discussed issues including the long-term effects of military service with several speakers, praising their work and talking of the effects which service can have.
He has also worked with the Ministry of Defence to help improve mental health support and training in the armed forces.
Last year, Harry gave the keynote address at the mental health conference, telling delegates that during his military service he had witnessed the suffering of those "struggling to seek out the help they desperately need".
The Duke of Sussex shared his thoughts with Tel Aviv University Professor Zahava Solomon who gave a speech based on her time in the Israel Defence Force.
She said: "He's really concerned and very interested in the inter-generational effects on the families of soldiers
"He said he could relate to those phenomenal challenges based on his own experience."
Neil Greenberg, an academic psychiatrist based at Kings College London who attended the conference, said: "In terms of giving credibility to this difficult topic, not only has he spoke on his own personal journey but also he has promoted the 'it's OK, not to be OK' message."
The conference was held in London's King's Centre for Military Health Research which has helped to shape government policy towards military personnel with research into war and health; war and psychiatry; personnel issues and social policy.