In the fourth book, "Oakleaf Bearers", or as it is known in the United States "The Battle for Skandia", while foraging for food, Cassandra is captured by a Temujai warrior. The Temujai are a fierce, nomadic tribe of horse warriors from the east and are masters of the recurve bow. Will tries to rescue her, but fails until Horace and Halt come along. Halt captures one Temujai and realizes the Temujai are back to try and take over the western world again. Twenty years earlier, they almost succeeded until politics and a serving of bad shellfish got in the way. Halt agrees to help Skandia drive off the Temujai since Halt feels if the Temujai defeats the Skandians, they will then attack Teutlandt, Gallica, and at last, Araluen. The Skandians make use of Halt's knowledge of the Temujai tactics, and Will takes charge of a force of archers to use in the upcoming battle against the Temujai.