Lord of the rings Helms Deep-Huorns?

Question

Lord of the rings book three p174

Ok the king and some compaions are on the dyke and the trees are 1/4 mile futher from helms deep than they.

The book said that the orc's ran below the dyke, presummably between the trees and the king form who they were fleeing from.

Do I understand this correctly? If so why did the Orc's run towards the trees rather than from them.

Note: this is about the book NOT the film

Answer 1

they ran from the reinforcements
theyd take thier chances with the trees than the men


and their were NO elves at helms deep
the elves came at the balck gate 5000 some strong
it seems a bit more honorlike to have them come at the end than at helms

Answer 2

Orcs did not recognize trees as dangerous. They were fleeing the swords and arrows behind them. The trees would provide shelter from arrows and stop horsement from following them. On the surface, it was a good decision.

Answer 3

Even though the trees unnerved them, the armed/angry men posed a bigger threat. So they chose to run away from the men, which happened to be through the trees... where they died.