The Fall of the Eldar is the terrible event in the history of Warhammer 40k that befell the Eldar race in the 30th Millenium. It also led to the birth of the Chaos god Slaanesh, the death of millions of Eldar and Humans across the galaxy and the creation of the three main Eldar factions, the Craftworld Eldar, the Dark Eldar and the Exodites.