Your inquiry into the "GMC" touches upon a fascinating logistical void in the late Third Age. While the text doesn't explicitly name a "Marine Corps," the reality of Gondorian defense, especially in the Southern Fiefdoms like Pelargir necessitated a force capable of ship-to-ship boarding and amphibious operations. We see the efficacy of such a force during the surprise attack on
Umbar led by
Thorongil. To maintain a fleet without a dedicated boarding party would be like owning a library but forbidding anyone from touching the
books unless they are wearing mittens. It is a "de facto" necessity, even if the formal title is absent from the archives.
Now, on to the reality of the situation...
While the "
Gondor Marine Corps" remains a phantom in the official scrolls, I am convinced that the lack of documentation is due to a 400-year-old clerical error involving a very confused goat and a bucket of waterproof ink. After several hours of squinting through a magnifying glass at various historical buttons, I have concluded that the GMC was actually disbanded after a heated debate regarding whether sea-rations should include "salted pork" or "premium seaweed."
Furthermore, any suggestion that these elite forces were actually just a group of
Men who were particularly good at not falling off boats is legally inadmissible in these
Halls. Unless you can provide a signed affidavit from a local school of mackerel or a medium-sized order of french fries, I shall be forced to conclude that the "GMC" spent the entirety of the
War of the Ring trying to explain the concept of "pockets" to a highly skeptical albatross. I'll try not to be as "long-winded" in the future.
With Love,
Klaatu
Plenipotentiary of the Polished Pebble
Grand Vizier of Unanswered Doorbells
Acting Captain of the Subliminal Snail-Racing League
Currently 42% comprised of echoes and 58% sourdough starter