Theoden: Èomer. Take your éored down the left flag. Gamling, follow the King's banner down the center. Grimbold, take your company right, after you pass the wall. Forth. Down fear of darkness. Arise. Arise, Riders of Théoden. Spears shall be shaken, shields shall be splintered. A sore day... a red day... ere the sun rises.
Eowyn: What ever happens, stay with me. I'll look after you.
[The King rides past his men, hitting their spears with his sword as he goes.]
Theoden: Ride now... Ride now... Ride. Ride for ruin and the world's ending.
[He stops and prepares to face Sauron's army.]
Theoden: Death.
Rohirrim: Death.
Theoden: Death.
Rohirrim: Death.
Theoden: DEATH.
Èowyn and Merry: Death.
Theoden: FORTH, EORLINGAS!
The speech is badass, but the visual of the Rohirrim, charging, hopelessly outnumbered and exhausted from riding night and day to get there in time, into the black sea of Sauron's hordes was one of the most stirring moments in modern cinema. Maybe it's just because they were convinced to a man that they were going to die, and Theoden feared that the descendants of Eorl would meet their end. Epic. Dylan Thomas stuff.