According to the "Iliad", Mycenaean warriors included boxing among their competitions honoring the fallen, though it is possible that the Homeric epics reflect later Greek culture. Boxing was among the contests held in memorial of Achilles' slain friend Patroclus, toward the end of the Trojan war. It was in commemoration of Patroclus that the Greeks later introduced boxing ("pygme / pygmachia") to the Olympic Games in 688 BCE. Participants trained on punching bags (called a korykos). Fighters wore leather straps (called himantes) over their hands (leaving the fingers free), wrists, and sometimes breast, to protect themselves from injury. There was no protection for the face or head.