Clockwise, from top left: A group of SS soldiers flee after the battle of Flensberg; Rommel's troops use a stolen American 25-pounder to bombard an airfield; a flight of Stukas prepare to attack a Resistance column; a Battleship fires at the battle of Flensberg; Keitel signs to Instrument of Surrender in front of Major General Henning von Tresckow and the other leaders of the Schwarze Kapelle; a group of soldiers secure a building in Berlin
July 20, 1944
August 6, 1944
Much of Central Europe
Nazi government dismantled, decisive Resistance victory
(Chronologically) Battle of Brandenburg Gate, Battle of Mezzouna, Battle of Munich, Battle of Rostock, Battle of Flensburg.
Schwarze Kapelle Resistance and large sections of the armed forces
SS-led Nazi government
Major General Henning von Tresckow
General Friedrich Obricht
Field Marshal Erwin Rommel
Field Marshal Gunther von Kluge
Lt. Colonel Claus von Stauffenberg
General Hans Oster
Field Marshal von Witzleben
Field Marshal William Keitel
Chief of Staff Alfred Jodi
Lt. Colonel Otto Skorzeny
General Erich von Manstein
5,350,000 Heer (army), 100,000 Luftwaffe (Air Force, but mostly support staff), 510,000 Kriegsmarine (Navy)
1,300,000 Heer, 1,600,000 Luftwaffe, 270,000 Kriegsmarine, ~~450,000 Waffen SS
300,000 Heer, 535,000 Luftwaffe, 73,000 Kriegmarine, ~~450,000 Waffen SS (All SS troops caught were executed)
The German Civil War erupted after the success of Operation Spark, which killed Hitler, Himmler, and Goring all at once. Immediately, both Speer and a combination of Bormann and Jodl attempted to form Governments to take over. Meanwhile, the army, now under the control of the rebels, fought against both with the aid of many of the most famed generals, including Rommel, Stauffenburg, and Tresckow.
For several years prior, a group in the Wehrmacht known as the Schwarze Kapelle, or Black Orchestra, had been planning to overthrow the Nazi Government of Germany. Led by Major General Henning von Tresckow and supported by prominent, popular officers including Claus von Stauffenberg and Erwin Rommel. Rommel, though initailly opposed to the idea, declared support for the revolution once it had been effected.
Operation Spark went into action on July 20th, 1944. As Stauffenburg was able to detonate both bombs (instead of just one as OTL), Hitler, Himmler, and Goering were all killed along with a large section of the German High Command.