After Hector’s funeral, Penthesilea the queen of the Amazons came to Troy, to enhance the Trojan side. In her battles she was very fierce, killing the Achaean Machaon. Some say she even killed Achilles, who was resurrected after an appeal by his mother Thetis to the gods. Ultimately, Achilles killed Penthesilea. Only after her death did he realise his true feelings about her, as he had fallen in love with the Amazon queen. An Achaean soldier, Thersites (said to be the ugliest Achaean), mocked Achilles as he saw him in such emotional weakness. Achilles killed him with a punch, but this fact angered all the other Achaean leaders, so he had to leave for Lesbos. Odysseus advised him to offer sacrifices to Apollo, Artemis and Leto in order to be purified.
While Achilles and Odysseus were absent from the conflict, King of Ethiopia, Memnon, half-brother of Priam, came to reinforce the Trojans. Like Achilles, Memnon's armour was forged by Hephaestus. In his first duel he managed to kill Antilochus, who was the son of the king of Pylos Nestor, and much loved by Achilles. Later he fought with Achilles himself. The two heroes were equivalent, but Zeus had determined that the fate of Memnon was to be killed and so it happened.
After that, Achilles drove the Trojans back to their city walls. As Achilles approached, the god Apollo gave the order to Paris to use his bow. And in fact the arrow of Paris scars and injures Achilles’ heel in a fatal way as this was the only part of his body that was mortal, as we said before. The murderer acted treacherously. So Achilles remained forever invincible until his death. After his death a fierce battle took place until the Achaeans managed to recover his body. Thetis the Nereid came to mourn the dead, while the Achaeans held games in his honour.