Answer:
1. He wanted an upgrade so no one would recognize him
2. Patroclus was killed in battle...
Step-by-step explanation:
1. Achilles lets his friend Patroclus use his armor during a battle, where his is mistaken for Achilles. After killing Patroclus, the Trojan hero, Hector, takes Achilles' armor and wears it. Finally, the god Hephaestus makes a new set of armor for Achilles, which the hero wears to fight and kill Hector.
2. In his Iliad, Homer does not explain what happened to Achilles. According to later legends (and bits and pieces of Homer's own Odyssey), the warrior returned to Troy after Hector's funeral to exact further revenge for Patroclus' death.