Huin, I have no idea what you refer to when you say
"an AT-AT sized Oliphaunt."
Pretty sure the Mariners of Umbar figured it out as they 'long-prepared' their fleet.
... and Will, seriously? You expect absolute realism in a mythical world? Unbelievable.
Boromir88, so far, I have yet to see exactly where it hasn't been faithful to any source material, which I have quoted in part. ¯\_(ツ)_/¯