Through the long night the Achaians wept over Patroclus; but deeper than their grief was the sorrow of Achilles, for he had promised Menoetius to bring back his son in honor, laden with spoils, and now the barren coast of Troy would hold the ashes of both. Then Achilles made a solemn vow not to celebrate the funeral rites of Patroclus until he brought to him the head and arms of Hector, and had captured on the field twelve Trojan youths to slaughter on his funeral pile. The hated Hector slain and Patroclus's funeral rites celebrated, he cared not for the future. The fate his mother had foretold did not daunt him. Since, by his own folly, his dearest friend had been taken from him, the sooner their ashes rested together the better. If he was not to see the rich fields of Phthia, his was to be, at least, a deathless renown.
To take the place of the arms which Hector had taken from Patroclus, Vulcan, at Thetis's request, had fashioned for Achilles the most beautiful armor ever worn by man. Brass, tin, silver, and gold composed the bright corselet, the solid helm, and the wondrous shield, adorned with such pictures as no mortal artist ever wrought.
After having feasted his eyes on this beautiful armor, whose clanking struck terror even to the hearts of the Myrmidons, Achilles sought out the Greeks and Agamemnon, and in the assembly acknowledged his fault. "Let these things belong to the dead past," said he. "My wrath is done. Let us now stir the long-haired Greeks to war."
"Fate, not I, was the cause of our trouble," replied Agamemnon. "The goddess of discord created the dissension, that Até who troubled even the gods on Olympus until expelled by Jupiter. But I will make amends with liberal gifts."
Peace having been made between the chiefs, Achilles returned to his tent without partaking of the banquet spread by Agamemnon, as he had vowed not to break his fast until he had avenged his friend. Agamemnon's gifts were carried to the tents of Achilles by the Myrmidons, and with them went Briseis, who, when she saw the body of Patroclus, threw herself upon it and wept long for the one whose kindness to her—whose lot had been sorrow upon sorrow—she could never forget. All the women mourned, seemingly for Patroclus, really for their own griefs. Achilles likewise wept, until, strengthened by Pallas, he hastened to put his armor on and urge the Greeks to battle.
As he mounted his chariot he spoke thus to his fleet steeds, Xanthus and Balius: "Bring me back when the battle is over, I charge you, my noble steeds. Leave me not on the field, as you left Patroclus."
Then Xanthus, with the long-flowing mane, endowed with power of speech by Juno, thus spake: "This day, at least, we will bring thee home, Achilles; but the hour of thy death is nigh, and, since the fates have decreed it, we could not save thee, were we swift as the winged winds. Nor was it through fault of ours that Patroclus fell."
Angry at the reminder of his doom, Achilles drove hurriedly to the field, determined to fight until he had made the Trojans sick of war.
Knowing that the war was drawing rapidly to a close, Jupiter gave permission to the gods to take part in it, and a terrible combat ensued. Juno, Pallas, Neptune, Hermes, and Vulcan went to the fleet of the Greeks, while Mars, Apollo, Diana, Latona, Venus, and Xanthus arrayed themselves with the Trojans. When the gods joined in the combat and Neptune shook the earth and Jupiter thundered from above, there was such tumult in the air that even the dark god of the underworld was terrified. In the battle of the gods, Apollo encountered Neptune, Pallas fought against Mars, Diana and Juno opposed each other, Hermes was pitted against Latona, and Xanthus or Scamander, the river god, strove against Vulcan. It was not long before Jupiter's fear was realized, and the mortals needed the aid of the gods. Æneas, encouraged by Apollo to confront Achilles, was rescued only by the intervention of Neptune, who, remembering that it was the will of fate that Æneas should be spared to perpetuate the Dardan race, snatched him away in a cloud, although he was himself aiding the Greeks.
Mad with rage and spattered with blood, Achilles pursued the flying Trojans about the plain, sparing none except the twelve youths who were to be butchered on the funeral pile of Patroclus. He stood in the river, filling it with slaughtered bodies until, indignant at the insults offered him, the river god Scamander caused his waters to rush after Achilles so that he fled for his life. Far across the plain it chased him, and was only stopped by the fires of Vulcan, summoned by Juno.