From the bunker.

Chapter 1. The backup plan

Disclaimer: I do not own harry potter in any way beyond what an owner of a copy of the books might anything that doesn't belong to J.K. Rowling belongs to their respective owners.

AU: In this timeline Germany and Japan where defeated in 1945 very shortly after each other atom bombs are dropped on Japan shortly after Berlin has been secured by the allies. This is mainly to fit the so Germany's defeat was pushed back a few months to allow the idea I had to work. For those looking for a plausible way for it to occur the Siegfried line held up longer and outer and inner Germany was better fortified.

Gellert Grindelwald was annoyed as he stormed to the fuehrer's office 'why was Hitler calling a meeting now if he didn't face Dumbledore soon they will never accomplish their goal.' As he paused to collect himself he sighed 'might as well get this over with' before walking into what he expected to be a long pointless meeting.

Grindelwald had to admit it Hitler's plan was crazy and logical a smile crawled up his face, exactly why they would never see it coming.

Flashback fuehrer's office

As Grindelwald entered the room he saw Hitler behind his desk with a couple of the Wunder Waffe scientists and the head of spying operations. "Please tell me why I need to be here mien fuehrer, Dumbledore is nearing if I'm not there to meet him we won't stand a chance" Said Grindelwald as soon as the door behind him clicked shut. The man behind the desk sighed before speaking "The Generals and I have been talking and we agreed on something." The man sighed before turning to face the wizard directly before speaking again. "We need a backup plan and soon, we are losing as much as I hate to admit it. However the plan I have is perfect, even if Berlin falls and we are written as the worst villains in modern history, we won't have lost." The man behind the desk grind wickedly "the plan is simple, we build a bunker." The wizard looked at his leader like he said the sky was green "Where?! We are just short of surrounded on our own doorstep!" He exclaimed as the Leaders grin grew wider "Where? Simple the last place they would ever look, Britain"