I've seen Return of the King so many times and they only used the dead army in one battle?

I hate the books. Hate them. I've decided that sometime in 2014 I'm going to give them another go, though, now that I'm older.

Also, part of why I hate RotK is because while the other movies had CGI, the entirety of RotK was leaning on CGI. I hate that. It's boring.