Many royal family members, like Queen Elizabeth II and Prince Edward, served in the military.

As part of his solo trip to Estonia, Prince William (42) arrived at Tampa Camp military base near the Russian border on Friday. The British royal appeared in combat uniform upon his arrival.

Prince Harry, who served in the British Army for a decade ... "His decade of military service is not determined by the uniform he wears, and we respectfully ask that focus remain on the life ...