This scene is only touched on briefly in the movie The Two Towers, so I got use a lot of creativity in building this. I researched the battle pretty extensively and did the best that I could with the parts I had.
About this creation
The charge of the Rohirrim led by Theodred!
A view of the entire battle. I like the orcs in the waste deep waters of the River Isen. Notice the Fish?
Oh look! There's a hobbit perusing the mushrooms! "That was a shortcut" "To what?" "Mushrooms!"
A view of the scene without the battle. When the Rohirrim and Orcs were decking it out, I added some torches to make it look more battle-like. I took them off for this shot.