The Sundering: Rise of the Witch King is a mod for Medieval 2: Kingdoms and based around the fantasy world of Game workshop's Warhammer universe during the civil war between the Elves, the mod's campaign opens with the Death of Bel Shanaar in -2751 IC.
This is one of the 40 speeches that you will be able to listen before the battles. This one is about a Naggarothi army attacking.
This speech has been recorded by John Rogers (Monkeydovoices) and written by Enkidu
More info about the voice actor here: Voice123.com
More info about the mod here: Twcenter.net