Late last year, a sleek monument was quietly added to the Semper Fidelis Memorial Park outside the National Museum of the Marine Corps. Called “Always Faithful,” it’s a memorial to Marine Corps military working dogs, inscribed with the names of each of the 25 Marine “War Dogs” killed during the 1944 liberation of Guam: Skipper. Tubby. Max. “To the Corps they served so devotedly, and to the Marines who accompanied them in combat, many of whom owe their lives to the bravery and sacrifice of these gallant animals, they were truly always faithful,” it reads. The statue is the bronze…