France conducted its first successful nuclear test in 1960.
Notes on verification
Confirmed by multiple independent, high-quality sources including historical archives and nonproliferation organizations, consistent on date, location, and codename.
Sources
- List of states with nuclear weapons (en.wikipedia.org)
- https://www.atomicarchive.com/history/cold-war/page-11.html (atomicarchive.com)
- https://www.nti.org/countries/france/ (nti.org)