Odysseus and Diomedes. To find out more about their raid on Rhesus, the Thracian king, see this Wikipedia article: link; for information about the image: image source.
In Book X of Homer's Iliad, the Greek heroes Odysseus and Diomedes raid the camp of King Rhesus of Thrace, stealing his famous horses and slaying the king. The event is also the subject of play by Euripides: Rhesus.
You can also find more myths and legends for the week of Feb. 26 - Mar. 3 here. For more information and links to the actual javascript code, see the Myths & Legends Widget Reference Page.