The score was used during the preparation for the battle scene to create tension, it starts of slow and unnerving but as the horses start running the instruments change to stringed instruments making the scene have a sadness to it as the audience know that they are running to there deaths. The sound of the instruments increase and become more intense as the danger gets closer, including loud drums beats.
The ADR was used when the leader of battle was giving a speech to the other warriors to make the sound a lot more clearer as there is a lot of open space that he was riding up and down on his horse which would have lost the sound.
The sound design was used for the troll and the dragon sounds to make them sound more realistic, with the trolls it sounds like they have used animal snorts such as pigs to make them seem disgusting and more fierce.
The foley was used to create the marching of the horses; the sound of the horses footsteps as they were coming over the hills was exaggerated to make the scene more intense and the warriors sound more important.
The ambiance was used to create the extra sounds in the background; for example the wind other than making the scene have a more realistic feeling it was used when the battlefeild went silent which gives the scene a discomforting and uneasy feel to it.