Grindelwald Had Defeated Dumbledore.

In 1945, the fate of the world hinged on two men. Albus Dumbledore and Gellert Grindelwald, the two greatest wizards of the age, fought a duel to determine the fate of all humanity.

The sorcery unleashed by the two master warlocks was epic. The duo wielded powers that had not been seen in millennia and wove together spells whose novelty and ingenuity were unlike anything witnessed before.

The battle could have gone either way, but in the end, Gellert Grindelwald emerged victorious. With his triumph, Gellert Grindelwald led the way to a new world authority where wizards no longer live in the shadows of the muggle world hiding in fear.

As Supreme Mugwump, Gellert Grindelwald reorganized and mobilized the forces of the magical world like they had not been since the Bronze Age, transforming the global population of wizards into his army. Combining novel new spells aimed at targeting muggle technology, Gellert Grindelwald transformed the world's communications infrastructure into a vast network of mind-control devices.

By the mid-1950s, the takeover was complete. Billions of muggles now go about their days with no idea that they are seen as little more than cattle by their magical overlords.