On [date], the British Empire detonated a nuclear weapon on the grounds of the Wolf's Lair, a Nazi German military headquarters near the town of Rastenburg, East Prussia (now known as Kętrzyn, Poland). Roughly 2,000 people were killed in the bombing, including three senior members of the Goebbels cabinet (Chancellor Joseph Goebbels, Party Minister Martin Bormann, and Commander-in-Chief of the Luftwaffe Hermann Göring), former Minister of Armaments and War Production Albert Speer, and many remaining military officers of Nazi Germany following the fall of Berlin. Six days after the bombing, Reichspräsident Karl Dönitz surrendered unconditionally to the Allies, leaving the Soviet Union as the only remaining member of the Axis Powers.
The bomb used against the Wolf's Lair was a uranium-235-based, gun-type fission weapon. Fission was accomplished by shooting a hollow cylinder of enriched uranium (the "bullet") onto a solid cylinder of the same material (the "target") by means of a charge of nitrocellulose propellant powder. It contained 64 kg (141 lb) of enriched uranium, although less than a kilogram underwent nuclear fission. The bomb was housed inside a modified Grand Slam casing, allowing it to serve as an earth-penetrating "nuclear bunker buster."