Why did Archille's mother plan to keep him from going to Troy? How did her plans work out?

Achilles' mother, Thetis, tried to keep him from going to Troy because she had received a prophecy that her son would either live a long, uneventful life or die a glorious but short death in the Trojan War. Thetis preferred to see her son live a long life away from the dangers of battle, so she sought to hide him. To prevent Achilles from joining the Greek forces headed to Troy, Thetis disguised him as a girl and hid him among the daughters of King Lycomedes on the island of Skyros. She hoped that this would keep him safely away from the conflict. However, her plan ultimately failed. The Greek leaders, including Odysseus, realized that Achilles was hiding among the girls. They devised a clever ruse to discover him: Odysseus presented gifts, including weapons, to the daughters of Lycomedes. When Achilles, intrigued by the weapons, revealed himself by choosing the weapons over the feminine gifts, it confirmed his identity. He was then taken to join the Greek forces at Troy, fulfilling the prophecy his mother sought to avert. Thus, despite Thetis's efforts, Achilles became a central figure in the Trojan War, ultimately leading to his own tragic fate.