LotR3-RotK-Seq15

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Originally Posted by Elladan and Elrohir

They apparently didn't spot the Rohirrim in the book, either.

In the books, to me, they are there to spread fear and remain pretty much out of bow shot (not that any remained on the walls to take a shot). Their Chief is riding through the Gate when the Rohirrim appear, and so hasn't the best vantage point to see the Riders. Plus, he'd left a trap on the road, with pits and orcs, and so thought it "inconceivable" that the Rohirrim would even show. And the orcs and other eyed creatures were baffled a bit by the Darkness.

In the movie it seems that there is more light, and the Winged One is flying around the battlefield more. He and his eight aces strafe the city, and to me that means that they have some kind of sight, and so would see the other army appear. Plus Gothmog wasn't blind, and unless we assume that Theoden et al were assisted off-screen by the Woses, there was a road by which help could come.

I quibble. Thanks for posting.