Not just a veteran, but something of a hero. He was mentioned in dispatches for service in the Battle of Cape Matapan, and served in action as XO of the destroyers HMS Wallace and later, HMS Whelp. One of his shipmates on the Wallace contributed a story about serving with him to an oral history project:
https://www.theguardian.com/uk/2003/dec/28/monarchy.davidsmith. Certainly he had connections, as Admiral Lord Louis Mountbatten was his uncle and guardian, but he was known to be both well-liked and respected as a commander by those who served under him.
There was always something charming about photos of Phillip and the Queen together, because they had a tendency to always stand together at public occasions and just beam at one another, and that lasted for as long as Phillip lived. That's saying something, when you can manage to keep that quiet affection always shining from your spouse's eyes for over 70 years.