Book 9 is a crucial moment in the Iliad. Consisting of nothing but talk, it is nevertheless the turning point towards inevitable fatality, as Achilles refuses to return to battle. The speeches in which he refuses are fascinating but difficult, because he seems to be doubting the value of the heroic code by which he has lived his entire life. With no help forthcoming from their greatest warrior, the Achaeans try to figure out their options. While it is still night, Odysseus and Diomedes go on a spying expedition to the Trojan camp. They encounter the unlucky Trojan counter-spy Dolon and kill him. In book 11, the Achaeans suffer yet another setback as three of their main warriors, Agamemnon, Diomedes, and Odysseus, are taken out of the battle with minor injuries.