Espionage and deception across the final years of World War Two, told through four episodes that jump between theaters. Operation Bagration shows how Soviet planners fed Hitler's generals a false picture of where the summer offensive would fall, collapsing German lines in Belarus. In the Ardennes, German commandos in captured American uniforms sabotage supply lines and sow confusion behind Allied positions during the Battle of the Bulge. At Leyte Gulf, a Japanese decoy force lures the US fleet away from the invasion beaches, nearly opening the door to disaster. The film's final stretch turns to the atomic spies, Klaus Fuchs and the Rosenbergs, who passed Manhattan Project secrets to Moscow and reshaped the postwar nuclear balance. Archival footage, maps, and historian narration carry the throughline that these operations were not sideshows but decisions that altered the war's outcome. History Hit assembles the four case studies into a single account of how intelligence work became as consequential as any battlefield.