Despite warnings from Macha, the human interference allowed Chaos to capture the Maledictum. This plan was thrown into chaos as the Blood Raven chapter of the Space Marines insisted on rooting out any taint of Chaos and destroying any Eldar on Tartarus who stood in their way. A Biel-Tan strike team, or Swordwind, led by Farseer Macha was tasked with the defense of the Maledictum, a powerful stone encasing an even more powerful daemon. Tartarus saw the planetary invasion of the Orks, but that was a minor threat compared to what the Eldar faced. They are constantly at the ready for battle, with many craftworlds such as Biel-Tan reclaiming many worlds lost to the Mon-Keigh, or non-Eldar, after the Fall. Still not all was lost, for the escaped Craftworlds float around the universe, trying to preserve the Eldar way of life. When Slaanesh was born in the middle of Eldar space, he destroyed much of the Eldar and their worlds, taking their souls and ripping a tear in real space where the Warp can cross over, known today as the Eye of Terror.

Others went away to far away planets to live a simple, secluded and restrained life.ДЇinally the corruption of the Warp proved too much, bringing about the birth of the Great enemy, the Chaos god Slaanesh, and in doing so doomed the Eldar race for eternity. So they and many Eldar created massive self sustaining starships, called Craftworlds, and took to the stars in hope of escaping the eventual Fall. The greatest of the Farseers foresaw this event, but their calls went unheeded. The dark vices of the Eldar were tainting the Warp, the source of their mystical abiliities. But the past of the Eldar is one of great pain and death, leading to the birth of the Great Enemy.Дuring the high point of the Eldar empire, many of the citizens became relaxed with their unchallenged domination of the galaxy and began to seek new experiences in many dark realms.

The Eldar are one of the oldest races in Warhammer 40,000 universe, using a wide variety of technology and equipment humans of the Imperium can only dream of.

Warhammer 40k assault cannon