How did Odysseus help the Greeks win the Trojan War?

Odysseus played a pivotal role in the Greek victory during the Trojan War through his strategic intellect and leadership. His contributions included:

• Recruitment and Diplomacy: Odysseus was instrumental in securing the participation of Achilles, whose presence was prophesied as vital for victory. Later, he helped reconcile Achilles with the Greek commander Agamemnon after their dispute.1
• Fulfilling Prophecies: Following the capture of the Trojan prince Helenus, Odysseus helped fulfill the conditions required for Troy's fall. This included retrieving the bow and arrows of Heracles from Philoctetes, recruiting Neoptolemus, and stealing the Palladium from Troy with Diomedes.12
• The Trojan Horse: Odysseus’s most famous contribution was devising the Trojan horse stratagem. He was among the elite warriors hidden inside the structure. When Helen attempted to expose the ambush by imitating the voices of the warriors' wives, Odysseus prevented his men from revealing themselves, ensuring the success of the infiltration. At night, the hidden Greeks emerged to open the city gates, allowing the army to sack Troy.1342