Three Factions

The Three Factions are the three groups of Fallen Angels, Devils, and Angels mentioned in the Bible, who are the focus of High School DxD.

Summary
Thousands of years ago, there were the Three Factions. Unlike other supernatural groups (the Norse Gods, the Hindu Gods, the Greco-Roman Gods, etc) which were apparently more or less independent of each other, these three were all interconnected with each other, and together the Three Factions spawned the Judeo-Christian religion, and became part of the Bible.

The Three Factions of Angels, Devils, and Fallen Angels, warred against each other under the leaderships of the Biblical God, the Four Great Satans, and the Fallen Angel organization, Grigori, led by Azazel which came to be known as the Great War. After the deaths of the Biblical God and the Four Great Satans, the Great War ended, but left the Three Factions in a state of conflict. However, due to the state of extreme exhaustion after the Great War with all three Factions losing their main forces, no side wanted to continue battling, so while there was no peace, outright battles did not happen either.

The Factions continued in this state with occasional conflicts between members who crossed paths for millennia, until Volume 4, where a peace treaty between the Three Factions, known as the Kuoh Treaty, was finally drawn up.

In recent events, such as the rise of the Khaos Brigade, the Three Factions have not only ceased fighting each other, but have even joined forces on a large scale to preserve their new-found peace.

Members
The Three Factions were originally made up of the forces of Heaven, consisting of the Biblical God and the Angels; the forces of the Underworld, consisting of the Four Great Satans and the Devils; and the Fallen Angels. After the Great War, the overall of the three changed drastically with the Angels losing their God, the Devils losing their forces and their leaders, the Four Great Satans, and the Fallen Angels who lost many of their forces except their leaders.

Following the creation of the Evil Pieces and Brave Saints system, the Devils and Angels forces include reincarnated humans and other species into their race.

Trivia

 * The Three Factions are the only known factions not to have any backing from a living god.
 * However, they appear to be one of the dominant supernatural groups.
 * The Three Factions are sometimes called the Bible Factions, because of their relationship to the Judeo-Christian religion and the Bible. Also the Three Great Powers, because of the seeming dominance of the Judeo-Christian religion.