One for example is when Patroclus was killed by Hector, Achilles, enraged by the death of his cousin died, finally wore his armor and weapon then quickly flew to the field killing many men in his fearsome and terrible anger.
Another one is Achilles' butchering and selling of Priam's other sons, because before Hector faced Achilles outside the gates of Troy, his father begged him not to face Achilles and presented him many reasons why not to fight Achilles, "And then my heart might shed its dreadful sorrow, for he's taken from me many valiant sons. Some he's butchered. Others he's sold in island far away"(Book 22, 57-60).
Then there is the great and epic fight between Achilles and Hector in which a great and long chase took place before the fight in which Achilles chased and chased after Hector, but Hector who is very quick could not loose the very agile Achilles then Athena interfered with the chase with Zeus' blessing. Then Athena deceived Hector by taking the form of Deiphobus, Hector's brother, and with the form of Hector's brother, Athena urged Hector to fight Achilles with his help.
Then when Hector faced Achilles, Deiphobus was nowhere to be found when the fight took place, suddenly Hector realized that his death is drawing near because he knew that the gods have already decided on what Hector's fate will be.
Just before they started, Hector asked Achilles that his body, be treated with respect and granted with the proper burial rites and the same would be done to Achilles, but Achilles with deadly anger in his heart refused with the proposal and said: "Hector, don't talk to me of our agreements. That's idiotic, like a faithful promise between men and lions." (Book 22, 336-338)
Both of them fought fiercely, but Achilles had the upper hand because he was more skillful in fighting than Hector ever was, then Achilles found a way through Hector's thick armor, which is the opening where the collar bone separates the neck and shoulder, stabbing it with his spear. Then with the remaining life within Hector, he used it to plead to Achilles that his body be allowed the proper burial rites, but cold-hearted Achilles replied: "So there's no one who'll keep the dogs from going at your head, not even if they bring here and weigh out a ransom ten or twenty times as much, with promises of more, or if Priam, son of Dardanus, says he'll pay your weight in gold. Not even then will your mother set you on a funeral bed and there lament the son she bore. Instead, the dogs and birds will eat you up completely."(Book 22, 450-459)
Then Achilles still not satisfied, cut through the tendons of Hector's body, tied a rope around then tied the other end to his chariot then sped off dragging his body behind, towards the Greek ships.
Therefore, here are the evidences of Achilles being more of a ruthless animal than of a man.





















