 Upon arrival, Heracles, knowing how King Diomedes treats strangers, wrestles with him, trying to bring King Diomedes to the stables, where the mares live.Even though Heracles is said to have unmatched strength, it is a long and reasonably even match, since Diomedes himself is the son of the god of war.He eventually loses to Heracles, and is brought to the mares’ manger where they devour him.