The Infinite War

The Infinite War is the basis of the plot of Fighters of Lapis 6: Brotherhood and the "Infinite War" story mode in The Mysterious Seven Project. The war initially raged on for ten long years and it surrounded the Infinity Gems of the Infinity Gauntlet.

History
The war began shortly after the events of Fighters of Lapis 5. That is literally all I can say at the moment.