Chpt. 1 Backstory
They were losing the war. Even with their superior numbers, homeworld was no match for the rebel army of earth. With a leader who could take injured gems and in a few moments heal them and revitalize them and an army who accepted fusion as a valid battle tactic their attacks never ceased in ferocity. As a last-ditch effort to win the war, the Diamonds set up a third kindergarten to try and get more troops onto the battlefield as fast a possible. But after Pink Diamond was shattered, the project was abandoned, in fact, all of Earth was abandoned. The cluster was placed in the planet's core and the Diamonds left, corrupting all the unprotected gems on the surface. Only a few survived, those protected by Rose Quartz and those who slept beneath the ground.