
Their empire spread across the galaxy, eventually encompassing at least 10,000 star systems and thousands more colonised planets, many concentrated in the region of the galaxy that would one day become the Eye of Terror. The Aeldari became increasingly arrogant and condescending towards other intelligent species. The technological prowess of the Aeldari soon eclipsed that of all the other civilisations of the galaxy, and they pushed the existing menaces of the time, such as the Orks, to the far fringes of their realm. Millions of Terran years ago, as the galaxy emerged from the defeat of the Necrons in the War in Heaven and the disappearance or extinction of the Old Ones, their creations, the Aeldari, emerged as the new masters of the galaxy. Warhammer 40K Darktide Review - Left To Shred Their empire is now little more than a forgotten dream.

Instead, until the late 41st Millennium when the term began to become common once more, they became known as the Eldar. All of these survivors surrendered the term "Aeldari" as a name for their species, casting it off as a reminder of their lost glory. The final group were the Exodites, Aeldari who, like their Craftworld brethren, had fled the excesses of the empire's heart, surrendered much of their advanced technology and lived peaceful, largely pastoral lives on the Maiden Worlds. Other Aeldari survivors included the Harlequins, the servants of Cegorach, the Laughing God, who roamed the far reaches of the Webway and moved between Commorragh and the Craftworlds at will. Among this group of survivors were many members of the empire's leadership, who would become the first of the Haemonculi. Other survivors, the hedonistic adherents of the Aeldari pleasure cults who had been protected from She Who Thirsts by settling within the interdimensional framework of the Webway, became the Drukhari or " Dark Eldar" of Commorragh. They named themselves the Asuryani, the followers of the Aeldari god Asuryan, though they became known to outsiders as the " Eldar." Some Aeldari survivors of the catastrophe fled the empire's core worlds in their massive, continent-sized voidcraft called craftworlds, creating the Infinity Circuits and pursuing the Asuryani Path to safeguard their life essence from Slaanesh's thirst - even after death.

Slaanesh's birth was a catastrophic event that consumed the heart of the Aeldari Empire's homeworlds within the newborn Warp rift called the Eye of Terror, as the Prince of Pleasure sought to absorb every Aeldari soul. It was this excess that ultimately brought about the empire's destruction when its people's psychic resonance in the Immaterium birthed "She Who Thirsts," the Chaos God of amoral pleasure, Slaanesh. The Aeldari Empire held almost complete control over the galaxy, even during Mankind's Age of Technology, and was characterised by both its own highly advanced technology and the increasingly cruel and hedonistic excesses of its people in its final years. The Aeldari Empire was the dominant power of the Milky Way Galaxy in the years after the end of the War in Heaven until the Fall of the Aeldari in the 30th Millennium A.D.

The Aeldari Empire, also sometimes anachronistically called the Eldar Empire, was the great interstellar empire of the Aeldari species.
