Battle of Oblivion's Gate

The Clans Unite
In 1133 after the seppuku of Emperor Toturi I the forces of the Empire marshalled together under the leadership of Toturi's general Saigorei to oppose the Lying Darkness who was undoing all of creation by turning the land of the dead into nothing but a memory.

The Assault
The combined Rokugani forces assaulted the Lying Darkness in the Shadowlands in the ruins of the Troll city Volturnum. The Battle was fierce and the boundries between the Spirit Realms began to crumble.

The Spirits
The Spirits from Yomi and Toshigoku began to emerge in great numbers, and more than one great hero from the past was among them. The Emperor Toturi I himself was there, free from the Shadow's grip.

The Battle
Many people died. Even the Dragon of Air allowed itself to become corrupted so that the Master of Fire Isawa Hochiu could reach the Master of Darkness, Goju Adorai and duel him. With the aid of a Shosuro actor Hochiu strikes down Adorai, weakening the Lying Darkness.

The Naming of Nothing
At this moment, while the Lying Darkness was weak enough to be named, Hitomi named it "Akodo", which destroyed the Lying Darkness and released a number of Akodo Ronin (now with amnesia).

The Victory
The now weakened Goju and Ninube minions of the Darkness fled to plan their vengeance.

Major References
Legend of the Five Rings: Third Edition Page 24.