Trivia: While Gothmog (played by Lawrence Makoare) is the only Orc identified in the film, here are the names of those un-named, who appear in the films: 1) Gorbag: the Orc (played by Stephen Ure) that argues over the mithril shirt and then fights with the Uruk in the Tower at Cirith Ungol, and later Sam stabs in the Tower when rescuing Frodo; 2) Shagrat: the large Uruk (played by Peter Tait) that argues with Gorbag over the mithril shirt; 3) Snaga: is Grishnákh's lieutenant in The Two Towers (he's played by Jed Brophy). He is the Orc who argues over food - Merry and Pippin - and tries to sneak up behind the Hobbits, but is killed by Uglúk.
Trivia: It always seemed illogical that when Faramir and his men were under attack by the Nazgul and retreating to Minas Tirith, Gandalf galloped out of the city to rescue them with Pippen astride. Why carry the extra burden of a Hobbit and put him in danger? Billy Boyd (Pippen) cleared up this inconsistency on the Extended DVD commentary. The scene was originally written so that Gandalf and Pippen are actually just arriving at Minas Tirith as the soldiers fall under attack, but this was later rewritten.
Trivia: The field outside of the Mines of Moria in "The Fellowship of the Ring" is the same place that the Paths of the Dead leads out to.
Trivia: The Cirith Ungol stair ledge was built as a wet weather set on the squash court in a hotel in Queenstown. In November of 1999, Sean Astin's (Sam) close-ups were shot in the taping of the first RotK shots, and as a side note Andy Serkis (Gollum) had not been cast yet. The set remained standing on the squash court and as things would go, it wasn't until a year later on November 30th, 2000, that Elijah Wood's (Frodo) first close-ups were actually shot on that ledge.
Trivia: A bit of trivia for those who haven't read the books. In the Grey Havens scene, the three Elven Rings can be seen upon the hands of their bearers: Vilya, mightiest of the Three, is worn by Elrond; Nenya, the Ring of Adamant, is still borne by Galadriel; and Narya the Great is seen on Gandalf's hand.
Trivia: The scenes at the Black Gate were shot at the army munitions training ground because of its wide, flat, desert type landscape. Before the shoot, the land had forty years worth of demolitions, land mines, mortars, grenades, etc., lying all over. The government asked the army to clear and dispose the ammunition for the filmmakers, but due to the soft ground many could've remained undetected. When the crew arrived for the shoot, an army officer lectured them and showed them different types of munitions to warn them of the possibility of finding more on the site, as dirt was kicked up during battle sequences. There were bomb disposal people surrounding them and sure enough shooting halted as things were discovered and cleared. The cast and crew were told that if they strayed from the designated areas and lost limbs, the army was not responsible.
Trivia: When King Théoden rallies his men before the first charge into the Battle of the Pelennor Fields, he rides along the first rank of his army brushing their lances with his sword. This scene was apparently inspired by the Japanese historic drama Kagemusha (1980), where the titular character performs a similar feat before he unceremoniously falls off his horse.
Trivia: The famous "Wilhelm" scream makes a reappearance during the scene where Faramir's men are fleeing from Osgiliath across the Pelennor Fields. Just after the people of Minas Tirith call out, "The White Rider" a Nazgul swoops down and snatches up one of Faramir's men. The "Wilhelm" is heard as he falls.