One idea could be to create a gift basket filled with his favorite war movies on DVD or Blu-ray. You could also add some popcorn and movie theater-style candy to complete the movie night experience. Another idea would be to get him a book on the history of a specific war or battle that he's interested in. You could also consider getting him a personalized military-themed gift, such as a photo frame with his military picture or a custom-made military challenge coin. If he's a collector, you could get him a replica of a weapon or other memorabilia from a specific war to add to his collection.
Or you can get him a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.