Kalran: Tales of the four nations/The Great Sundering in the Third Age

In Arkalion it was called the Feast of Blood, Alcradia the Burning of Yordres, Axio the Purge by Longknives, and Askrian the Desecration of the Dead. But all of them have two things in common.

All four happened in the third age.

And all four led to the rise of the Horde, Reclaimers, Ouroboros, and Cult.

The Feast Of Blood
"They surrendered! She even took her army and accepted your demands at the truce because she trusted you and this is how you repay her? By murdering thousands of innocents and her because you couldn't trust her?"

-Trajan Cestrios, one of the original members of the rebellion and united the ten races in a force that would become the BGF, in the aftermath

The Burning Of Yordres
"Out of the sixty million you killed in that impulsive strike more than half of them were FUCKING CIVILIANS!"

-Finn York, an original member of the Revolutionaries and future founder of the ADF, confronting Bahlgram upon seeing the casualty reports

The Fall of an Empire
But in the end those events were but a prelude to the bloody end of an old kingdom. However corrupt they were attempting to find redemption and the fate handed upon them is considered more evil than their past actions.

Arkalion: Burning Of Salhaim
(inserting rest of lore here at some point)

With the fall of Salhaim the people of the southlands who refused to kneel to Nihalos, including the entire population of the Nymphs, Goblins, and Trolls, fled northwards to Remlia. With many more joining the garrison of Byzalem, hoping to one day reclaim their home.

Trivia

 * The Feast of Blood is based off the red wedding from game of thrones.
 * The Burning of Yordes is based off ww1 Dresden night and the white phosphorus bombardment from spec ops the line
 * The Purge by Longknives is based off the Nazi Night of the Long Knives.