Homer is credited with writing the 'Iliad,' an ancient Greek epic poem. Composed in the 8th or 7th century BCE, the Iliad narrates the events of the Trojan War, particularly focusing on the Greek hero Achilles and his conflict with King Agamemnon. The poem explores themes of rage, honor, and the impact of war on human life. Homer's literary works have had a profound influence on Western literature and are considered foundational texts in the study of ancient Greek culture and storytelling. His mastery of language and narrative structure has left a lasting legacy.