The Connacht army separates, with Ailill leading one section, and Medb and Fergus leading the other. Ailill is suspicious, and sends his charioteer to spy on them. The charioteer finds Fergus and Medb having sex, and unnoticed, steals Fergus' sword, which Ailill keeps safe as proof. Fergus makes himself a dummy sword of wood to hide his loss. Cúchulainn holds up the army's progress by fighting a series of champions in single combat. Fergus is sent to face him, but as foster-father and foster-son, neither wants to fight the other, and in any case Fergus has no sword. Cúchulainn agrees to yield on this occasion, on the condition that Fergus yields the next time they meet.