Operation Ivy, the eighth U.S. nuclear test series staged in late 1952 at Enewetak Atoll in the Marshall Islands, was the first to involve a hydrogen bomb, following President Truman’s 1950 order, with the weapons capable of remote detonation from the USS Estes. (1404×933)

[https://en.wikipedia.org/wiki/Operation_Ivy#/media/File:IvyMikeCloudTrinity&Beyond.jpg](https://en.wikipedia.org/wiki/Operation_Ivy#/media/File:IvyMikeCloudTrinity&Beyond.jpg)

**Operation Ivy** was the eighth series of [American](https://en.wikipedia.org/wiki/United_States_and_weapons_of_mass_destruction) [nuclear tests](https://en.wikipedia.org/wiki/Nuclear_test), coming after [*Tumbler-Snapper*](https://en.wikipedia.org/wiki/Operation_Tumbler-Snapper) and before [*Upshot–Knothole*](https://en.wikipedia.org/wiki/Operation_Upshot%E2%80%93Knothole). The two explosions were staged in late 1952 at [Enewetak Atoll](https://en.wikipedia.org/wiki/Enewetak_Atoll) in the [Pacific Proving Ground](https://en.wikipedia.org/wiki/Pacific_Proving_Ground) in the [Marshall Islands](https://en.wikipedia.org/wiki/Marshall_Islands).

# Background

The Operation Ivy test series was the first to involve a hydrogen bomb rather than an atomic bomb, further to the order of President [Harry S. Truman](https://en.wikipedia.org/wiki/Harry_S._Truman) made on January 31, 1950, that the US should continue research into all forms of nuclear weapons. The bombs were prepared by the [US Atomic Energy Commission](https://en.wikipedia.org/wiki/United_States_Atomic_Energy_Commission) and Defense Department aboard naval vessels, and were capable of being detonated remotely from the control ship [USS *Estes*](https://en.wikipedia.org/wiki/USS_Estes).

[^(https://en.wikipedia.org/wiki/Operation_Ivy)](https://en.wikipedia.org/wiki/Operation_Ivy)