Little Boy

E50421

atomic bomb nuclear weapon uranium-based fission bomb

Little Boy was the codename for the uranium-based atomic bomb dropped on Hiroshima, Japan, by the United States on August 6, 1945, marking the first use of nuclear weapons in warfare.

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All labels observed (4)

Label	Occurrences
Little Boy canonical	13
Little Boy atomic bomb	6
Little Boy (Hiroshima uranium bomb)	1
the Little Boy	1

Statements (49)

Predicate	Object
instanceOf	atomic bomb ⓘ nuclear weapon ⓘ uranium-based fission bomb ⓘ
approximateYield	13–18 kilotons of TNT ⓘ 15 kilotons of TNT ⓘ
casualtiesContext	caused massive civilian casualties in Hiroshima ⓘ
category	Nuclear bombs of the United States ⓘ World War II weapons of the United States ⓘ
cityTargeted	Hiroshima ⓘ
codenameOf	uranium-based atomic bomb dropped on Hiroshima ⓘ
continentTargeted	Asia ⓘ
countryOfOrigin	United States of America ⓘ surface form: United States
crewCommanderOfDeliveryAircraft	Paul W. Tibbets Jr. ⓘ
dateOfUse	1945-08-06 ⓘ
deliveredBy	509th Composite Group ⓘ
deliveryAircraft	Enola Gay ⓘ
deliveryMethod	air-dropped bomb ⓘ
designType	gun-type fission weapon ⓘ
developedBy	Los Alamos Laboratory ⓘ Manhattan Project ⓘ
developmentCountry	United States of America ⓘ surface form: United States
developmentPeriod	World War II ⓘ
diameter	approximately 71 centimeters ⓘ
droppedOn	Hiroshima ⓘ
era	early Cold War precursor ⓘ
explosionHeight	approximately 600 meters above Hiroshima ⓘ
firstUseContext	first atomic bomb used in combat ⓘ first nuclear weapon used in warfare ⓘ
fissileMaterial	uranium-235 ⓘ
followedBy	Fat Man ⓘ
historicalSignificance	contributed to Japan's decision to surrender ⓘ demonstrated destructive power of nuclear weapons ⓘ triggered global nuclear arms race ⓘ
length	approximately 3 meters ⓘ
nicknameLanguage	English ⓘ
operator	United States Army Air Forces ⓘ
opposedBy	some Manhattan Project scientists ⓘ
purpose	to demonstrate U.S. nuclear capability ⓘ to force Japanese surrender ⓘ
relatedEvent	atomic bombings of Hiroshima and Nagasaki ⓘ
relatedOperation	Manhattan Project nuclear tests and development ⓘ
targetCountry	Japan ⓘ
usedBy	United States Army Air Forces ⓘ
usedInConflict	World War II ⓘ
usedInTheater	Pacific War ⓘ
usedOnDate	1945-08-06 ⓘ
warheadType	fission ⓘ
weaponType	strategic bomb ⓘ
weight	approximately 4,400 kg ⓘ

Referenced by (21)

Full triples — surface form annotated when it differs from this entity's canonical label.

Project Y → notableProject → Little Boy ⓘ

Fat Man → otherCombatNuclearWeapon → Little Boy ⓘ

Enola Gay → bombTypeCarried → Little Boy ⓘ

atomic bombings of Hiroshima and Nagasaki → weaponUsedAtHiroshima → Little Boy ⓘ

B-29 Superfortress → carried → Little Boy ⓘ

this entity surface form: Little Boy atomic bomb

Site X → producedFor → Little Boy ⓘ

this entity surface form: Little Boy atomic bomb

Secret City → contributedTo → Little Boy ⓘ

this entity surface form: Little Boy atomic bomb

Hiroshima → bombNickname → Little Boy ⓘ

K-25 Project → associatedWith → Little Boy ⓘ

Project Alberta → notableWork → Little Boy ⓘ

this entity surface form: Little Boy atomic bomb

V-Site buildings → associatedWithWeapon → Little Boy ⓘ

this entity surface form: Little Boy atomic bomb

509th Composite Group → bombTypeUsed → Little Boy ⓘ

44-86292 → bombTypeCarried → Little Boy ⓘ

the Nightman Cometh musical → portraysCharacter → Little Boy ⓘ

subject surface form: The Nightman Cometh

this entity surface form: the Little Boy

Oak Ridge Gaseous Diffusion Plant → associatedWith → Little Boy ⓘ

this entity surface form: Little Boy (Hiroshima uranium bomb)

Los Alamos Primer → relatedToWeapon → Little Boy ⓘ

Operation Centerboard I → weaponUsed → Little Boy ⓘ

393d Bombardment Squadron → weaponDelivered → Little Boy ⓘ

The Atomic Bomb Group → usedWeapon → Little Boy ⓘ

390th Air Service Group → supportedWeapon → Little Boy ⓘ

this entity surface form: Little Boy atomic bomb

Operation Silverplate → testedWeapon → Little Boy ⓘ