Great Soul War

The Great Soul War (偉大な魂の戦争, Idaina tamashī no sensō) was a large spiritual war began when Humans were created, and still being fought throughout the Tenchikaimei series.

World War III
Unbeknownst to Humans, a much more sinister plot was in motion during the third World War. Fighting on the same planet as the Humans of Earth, the Tenshi and the Akuma continued their ancient war for the souls of men, away from Human sight. The Akuma had finally gained an advantage in the battle, using their abilities to possess Humans to gain control over powerful figures in the world's governments and armies, hoping to cause the Human race to self-destruct itself in this third World War. The Tenshi, in desperate need of a plan, enlisted the help of the White Priests; a group of humans with supernatural powers, to fight back against the Akuma.