The "Iliad" is an ancient Greek epic poem in dactylic hexameter, traditionally attributed to Homer. Usually considered to have been written down circa the 8th century BC, the "Iliad" is among the oldest extant works of Western literature, along with the "Odyssey", another epic poem attributed to Homer, which tells of Odysseus's experiences after the events of the "Iliad".

Set during the Trojan War, the ten-year siege of the city of Troy (Ilium) by a coalition of Mycenaean Greek states (Achaeans), it tells of the battles and events during the weeks of a quarrel between King Agamemnon and the warrior Achilles.

Although the story covers only a few weeks in the final year of the war, the Iliad mentions or alludes to many of the Greek legends about the siege.

More Info: en.wikipedia.org