[ WP ] The Nazis cracked time travel , and Hitler went back to redo the war knowing ahead of time what his enemies would do . A double agent for the Allies followed him .

April 1945, Underground Bunker 
 
 “ Heil Führer, we have finished preparations for Operation Fükart. A body double has been laid down, and this portion of the bunker is set to explode once we send you. There is room for only one more inside the chamber.'' 
 
 Hitler looked at the only remaining scientist left in the Reich. The others had been captured, expatriated, killed, or had escaped as German territory was seized. This one stayed loyal to the end and would be valuable for a new future. 
 
 “ Give me a moment to collect my belongings. ” Hitler turned and looked at a picture of Eva sitting on his desk. 
 
 I will miss this reality, he thought. He grabbed a single bag from the chair and went to the chamber. 
 
 “ Katze, let ’ s go.'' 
 
... 
 
 April 1943, Berlin 
 
 Hitler, moustache shaved, spoke to his counterpart from 5 years prior. “ My time machine did not bring me back as far as I wanted to. I had meant to return before the invasion of Russia, but instead the Allies have began their assaults. No mater, I know what operations they are planning.'' 
 
 The other Hitler looked back. He had been planning Operation Fükart for several years, and only a few people would have known about it. Unfortunately that means this man is to be trusted - he would have only come back in defeat. 
 
 The scientist left looked at the two men, and said “ Führers, in one year we will have a technological edge over our enemies.'' 
 
 Plans were laid out: hold off on attacking the English over London, defend Italy, and crush the French invasion. Hold the Soviet line without pushing deeper in and losing more men. 
 
... 
 
 April 1943, London 
 
 “ It seems there are now two sources of our tracking frequency. Both are in Berlin, ” a man in a lab coat said. 
 
 “ What does that mean? ” General Eisenhower was impatient today. 
 
 “ It seems that we have two men on the inside instead of one.'' 
 
... 
 
 August 1943, Berlin 
 
 “ How could they adapt to our strategy so well, ” the mustached Hitler said. “ They must have a spy. ” 
 
 The two men from the Chamber, Hitler and his scientist, sat next in front of him, held by several SS agents. 
 
 “ I can not trust anyone any longer. Your knowledge has been absorbed by our scientists and you are now a liability. The knowledge of the future has been written and does not serve me anymore.'' 
 
 Hitler waved his hands and exited the room. He returned to his quarters, and the familiar purring sound within. Eva lay on the bed. 
 
 Bang. Bang. 
 
... 
 
 April, 1944, London 
 
 `` It seems as if our men on the inside were successful. Germany has surrendered, Hitler has been captured, and their technology assimilated. It appears that they developed a type of time travel, and both a second Hitler was able to enter into this timeline and help plan for the war. Unfortunately for them, our agent made it through as well. ” 
 
 Eisenhower sat, amused. 
 
... 
 
 May 1948 
 
 “ Today we celebrate the death of our most important agent. Singlehandedly responsible for bringing down the Nazis, this statue will commemorate both our victory and its costs.'' 
 
 Truman pulled down a curtain. 
 
 The bronze cat stood 2 meters in the air. Inscribed on the base were two words: 
 
 Heil Kitler.
