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19 June 1953Primary source · 2 sourcesWell documented

The Rosenbergs Become the First Americans Executed for Peacetime Espionage

On the timeline · around 19 June 1953 · Coexistence & CrisisThe FreezeCoexistence & CrisisThe Rosenbergs Become the First Americans Executed for Peacetime Espionage195219531954195519561957

What happened

Julius and Ethel Rosenberg were convicted of conspiracy to commit espionage for passing information about the atomic bomb to the Soviet Union. They were executed at Sing Sing Prison in Ossining, New York, on 19 June 1953, becoming the first American citizens put to death for espionage in peacetime. President Eisenhower rejected clemency petitions, arguing in his public statement that the Rosenbergs had engaged in a deliberate betrayal that put the lives of many thousands of innocent citizens at risk.

Why it matters

The case remains one of the most contested prosecutions of the entire Cold War, separate from and more severe in outcome than the broader McCarthy-era investigations happening at the same time. Unlike the loyalty oaths and blacklists sweeping through government and entertainment, the Rosenberg case ended in the death penalty for two American civilians, and Ethel's specific level of involvement has remained a subject of historical dispute and later document releases.

How we know

The Eisenhower Presidential Library's archives include Eisenhower's own public statement declining clemency and explaining his reasoning, along with materials documenting the case and the clemency petitions submitted before the execution.

Sources

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