The Manhattan Project aimed to build a weapon using nuclear fission.
Notes on verification
Well-established historical fact confirmed by multiple reputable sources including encyclopedic references. [cascade flags: aggregator_dropped_primary_exists | tier=unverified indep_score=0.375 clusters=1 claim_tier=everyday] [harvest 2026-09-15: +4 source(s) on new hosts; tier unverified->silver indep=1.0 clusters=4] [kind-backfill 2026-09-15: kind=empirical eligibility=high]
Sources
- History of nuclear weapons (wikipedia)
- https://soviet-union.com/coldwar/manhattan-project (corroboration)
- https://www.britannica.com/event/Manhattan-Project (corroboration)
- https://www.archives.gov/milestone-documents/manhattan-project-notebook (corroboration)
- https://ahf.nuclearmuseum.org/ahf/history/manhattan-project/ (corroboration)
- https://www.energy.gov/lm/manhattan-project-background-information-and-preservation-work (corroboration)