The heir to the throne met with British and Polish troops in Rzeszow, a city that has become a hub for shipments of military and humanitarian aid bound for Ukraine.
The demonstration followed two recent incidents involving protesters throwing eggs at King Charles III.
The Most Fascinating Details Shared In Prince Harry’s Memoir
The transition would mean removing King Charles III — Jamaica's current monarch — as head of state.
Despite his concern, the Duke of Sussex also stated that his brother "has made it very clear to me that his kids are not my responsibility."
King Charles, Prince William and Kate Middleton put on a united front on Thursday, two days after the publication of "Spare."
The Duke of Sussex's media tour for his tell-all memoir has contained yet more insight into his life as a royal.
The Duke of Sussex addressed leaks from his new memoir, "Spare," for the very first time as he spoke to Stephen Colbert on "The Late Show."
The Duke of Sussex spoke to "Good Morning America" about his fractured relationship with the Prince of Wales.
The Duke of Sussex writes about his fractured relationship with his brother in his new memoir, "Spare."