Ynarri attack and defeat Craftworld Eldar

In 03.020M42 the Ynnari reappeared in the Aleph Sector in strength. Bringing prophecies of an impending calamity the youngest eldar faction appealed to the Craftworlds of their race for unity of purpose, and a change to their strategies within the aleph sector. While most of the Aeldari race complied, a few Craftworlds resisted, and refused to accept the "advice" of this new faction. One in particular refused to go to war as the Ynnari instructed, and remained set on their path of glorious isolation. This was unacceptable to the Ynnari, who demanded that all of their race answer the call to arms. Unable to defeat the Craftworld of Ul'Staer with logic, the Ynnari instead took direct action.

 

In a series of actions throughout the webway, the Aeldari race went to war, with itself. Two major actions saw the Ynnari defeat the Craftworld eldar decisively. Led by their warlock conclave, the first engagement was decisive, with a Ynnari Solitaire going after and killing the eldar farseer of Ul'Staer who the Ynnari held responsible for the failure of their Craftworld to listen to their demands. This first engagement broke the Ul'Staer resistance, but fighting continued through the webway for several days, as pockets of resistance were systematically defeated.

 

By 2403.020M42 the matter was settled. The Ynnari had proved they would take Aeldari lives in order to ensure unity of purpose, and all the Craftworlds in the sector were aligned to their new purpose. However, none outside the Ynnari yet knew what that purpose was.