Kathmandu— In early August 1945, three pivotal events unfolded that irrevocably changed global history: the atomic bombings of Hiroshima and Nagasaki, and a clandestine transfer of nuclear secrets to the Soviet Union. On August 6th, the United States dropped an atomic bomb on Hiroshima, followed by Nagasaki on August 9th, resulting in unprecedented devastation and loss of life. Simultaneously, unknown to U.S. leadership, a young scientist named Ted Hall began providing detailed information about the plutonium bomb’s design to Soviet intelligence, ultimately accelerating their own nuclear program and preventing a potential preemptive strike against them.

The Atomic Bombings and Their Immediate Aftermath

On August 6, 1945, three B-29 Superfortress bombers approached Hiroshima at 31,000 feet. The city’s residents, accustomed to American planes passing overhead, largely ignored the formation until one released a 10-foot bomb. The resulting explosion instantly killed an estimated 80,000 people, with another 100,000 dying in the following weeks and months from radiation and injuries, leveling the city of 350,000. Three days later, a second atomic bomb was dropped on Nagasaki after being diverted from its original target due to cloud cover. Approximately 40,000 people died instantly, with another 100,000 succumbing to their injuries over time. Captain Robert A. Lewis, co-pilot of the Enola Gay, recorded in his notebook a haunting question: “My God, what have we done?”

A Demonstration of Power and a Warning to Moscow

The U.S. plan for the bombings was not solely aimed at forcing Japan’s surrender; it also served as a demonstration of power directed towards the Soviet Union. The Truman administration intended to establish a nuclear monopoly and deter future aggression. No warning was given to residents of either city, and the timing—8:00 a.m.—was chosen to maximize casualties. While some argue that Japan was already defeated, President Truman believed the bombs were necessary to avoid a costly invasion. Gen. Dwight D. Eisenhower, however, expressed misgivings about the decision, believing Japan was seeking terms of surrender and questioning the necessity of such a drastic measure. “I was one of those who felt that there were a number of cogent reasons to question the wisdom of such an act,” he recalled in his memoir.

The Leak: A Teenager’s Decision to Share Secrets

Unbeknownst to U.S. authorities, Ted Hall, a 19-year-old scientist working on the Manhattan Project, began passing information about the plutonium bomb's design to Soviet intelligence in October 1944. Concerned that the US would maintain a nuclear monopoly after the war, Hall believed it was crucial for another power to possess such weaponry as a deterrent. He connected with Soviet agents and provided detailed schematics, including plans for the complex implosion system used in the Nagasaki bomb. This information reached Igor Kurchatov, the director of the Soviet atomic bomb project, who successfully convinced Stalin to prioritize plutonium-based weapons over uranium.

Soviet Success and a Shifted Global Landscape

Just four years after the bombing of Nagasaki, on August 29, 1949, the Soviet Union detonated its first atomic bomb—a virtual copy of the “Fat Man” device. This event shocked Washington and thwarted plans for a preemptive nuclear strike against the USSR, which had been considered by Pentagon strategists who believed they would need around 400 bombs to destroy the Soviet Union as an industrial society. Instead, the world entered the Cold War era, characterized by an arms race and the threat of mutually assured destruction. The US effort to keep its atomic secrets from the Soviets, dating back to the early days of the Manhattan Project, had ultimately failed.

The convergence of these three events in August 1945 not only brought World War II closer to its end but also laid the foundation for a new geopolitical order defined by nuclear deterrence and decades of Cold War tension.

(With inputs from CounterPunch)

Originally published on abcnews.com.np.