🌐EnglishEnglishEspañolFrançaisPortuguêsالعربية中文日本語EntityQ3293979· pop 9· linked from 117 articlesOperation GrappleAlso known as Grapple X, Grapple Y, Grapple Z, X/Round CBritish nuclear weapons tests of very-early hydrogen bombsWikidata factsImageOperation Grapple May 1957.jpgSources (2)github.comwikidata.orgvia Wikidata · CC0On the map9 mapped locationsAvailable in 8 languagesFrançaisPortuguêsالعربيةFinnishHebrewMalayalamRomanianvia Wikidata sitelinks · CC0Connectionsenriched uraniumEntityRoyal EngineersEntityCategories1957 in military history1957 in the Gilbert and Ellice Islands1957 in the United Kingdom1958 in military history1958 in the Gilbert and Ellice Islands1958 in the United Kingdom20th-century military history of the United KingdomBritish nuclear weapons testingExplosions in 1957Explosions in 1958Kiritimati