Harry and Meghan are set to travel to country as part of their Africa tour this autumn.
The duke, 34, attended the Chatham House Africa Programme event on ‘Mine Clearance, Conservation, and Economic Development in Angola’ on Monday morning.
During a speech, he said: "I was told just the other day of the positive transformation in Huambo since my mother walked that minefield all those years ago."
Diana famously walked through an active minefield in Angola in January 1997 as part of her work with HALO (Hazardous Areas Life-Support Organisation) Trust, just months before her tragic death.
Harry, who was patron of the HALO Trust’s 25th anniversary, is said to want to continue his mother’s legacy.
In 2013, he visited the Cuando Cubango region in southeast Angola with the charity, where he saw first-hand the impact of landmines on communities and the human suffering they cause.
He also visited Chatham House in June 2017 to take part in a scenario planning exercise, which explored how to respond to a humanitarian emergency that required landmine clearance.
In Monday’s speech he recalled that visit, saying: “That exercise showed me the importance of landmine clearance within a humanitarian emergency because, let’s not forget, land mines are a humanitarian issue NOT a political one.”
Angola has some of the world’s most important remaining wilderness, however, the presence of landmines and remnants of the civil war render large areas of the country unsafe for both animals, and the local people who depend on deriving a sustainable livelihood from their natural environment.
The Angolan Government is about to provide £47 million of funding to clear landmines in two national parks, a major opportunity for the conservation of southern Africa’s last great wilderness.
Harry and Meghan will also reportedly visit Malawi, South Africa and possibly Botswana during their tour.
It’s not known whether their newborn son Archie Harrison Mountbatten-Windsor will join them on the trip.
The Sussexes released a new photo of Archie to mark Harry’s first Father’s Day.