The Big Bang Theory

Sgt. Sheldon Cooper coordinating a guerrilla bombing against the Neco Arc's Nya-Nya power storage facility.

The Big Bang Theory is a name given to one of the earliest wars in existence. Many scientists claim that it was so massive that it the cause the death of a universe prior to ours and gave birth to the current universe.

The only surviving recording of this massive war, comes from a slot machine, created by Stephan Hawkins, which inspired a separate TV show of the same name, but the only thing it shares, are the figureheads and Sergeant Sheldon's war cry: BAZINGA!!!

The war itself lasted for a long ass time, as information of the past universe is scarce besides the Old Gods and was started when the Neco Arc declared war on the Funk Giants by infesting and populating in their holy gas chambers, spreading cringe. Those bastards were typically blown away to something else that was eldtrich, suffocate to their gaseous forms or get "gorked" on. Their home nebula had further retaliation, commencing the Battle of Sus. Named after fighting on planet owned the impostors among us who fought for both sides.

Long story short only 7,000 or so entities survived that war and the immortal ones live out their days terrorising