Odysseus was one of the main Achaean leaders in the Trojan War. The others were "godlike" Achilles, Agamemnon "lord of men", Menelaus, Nestor, Telamonian Ajax and Ajax the Lesser, Diomedes and Teucer the master archer.
When the Achaean ships reached the beach of Troy, no one would jump ashore, since there was an oracle that the first Achaean to jump on Trojan soil would die. Odysseus tossed his shield on the shore and jumped on his shield. He was followed by Protesilaus, who jumped on Trojan soil and later became the first to die.
Odysseus never forgave Palamedes for unmasking his madness ruse, leading him to frame him as a traitor. At one point, Odysseus convinced a Trojan captive to write a letter pretending to be from Palamedes. A sum of gold was mentioned to have been sent as a reward for Palamedes's treachery. Odysseus then killed the prisoner and hid the gold in Palamedes's tent. He ensured that the letter was found and acquired by Agamemnon, and also gave hints directing the Argives to the gold. This was evidence enough for the Greeks and they had Palamedes stoned to death. Other sources say that Odysseus and Diomedes goaded Palamedes into descending a wall with the prospect of treasure being at the bottom. When Palamedes reached the bottom, the two proceeded to bury him with stones, killing him.
Odysseus was one of the most influential Greek champions during the Trojan War. Along with Nestor and Idomeneus he was one of the most trusted counsellors and advisers. He always championed the Achaean cause, especially when the king was in question, as in one instance when Thersites spoke against him. When Agamemnon, to test the morale of the Achaeans, announced his intentions to depart Troy, Odysseus restored order to the Greek camp. Later on in the Iliad, after many of the heroes had left the battlefield due to injuries (including Odysseus and Agamemnon), Odysseus once again persuaded Agamemnon not to withdraw. Along with two other envoys, he was...