Reviving Sith Empire series

The Reviving Sith Empire series (RSEs) was an AU fanfiction series in the Legacy era with a number of changes to the history of the Galaxy as far back as the Third year of the, the resounding chaos in the early years of that war caused the awakening of two extremely powerful entities called that awaken from their sealed state to see the Galaxy falling into anarchy before their eyes, using this to their advantage they make sure to seek out new allies and resources while they destroy surviving past enemies in preparation for a new Sith Empire of their own construction to become the greatest dominant Superpower in the Galaxy.

A few months into 44 ABY, they launch their plan to bring the to its knees by secretly backing the growing conflict between the  and the Confederation, before attacking both sides and dominating a large portion of the Galaxy.