The_passage_of_the_marshes -

: Tolkien's descriptions are widely believed to be influenced by his horrific experiences in the trenches of the Somme during World War I . ⚔️ Key Lore: The Battle of Dagorlad

: Peter Jackson’s film adaptation famously depicts the "corpse-lights" (candles of the dead) flickering in the water.

: After capturing Gollum in the Emyn Muil, Frodo and Sam force him to lead them toward Mordor.

: The Hobbits see "dead faces" under the water—soldiers from the Battle of Dagorlad (the Last Alliance) who fell thousands of years prior.