World War II was the deadliest conflict in human history.
Notes on verification
Well-corroborated by multiple encyclopedic and educational sources; widely accepted historical consensus, though exact death toll estimates vary by methodology. [cascade flags: aggregator_dropped_primary_exists | tier=bronze indep_score=0.3 clusters=2 claim_tier=everyday]
Sources
- World War II (wikipedia)
- https://courses.lumenlearning.com/suny-hccc-worldhistory2/chapter/casualties-of-world-war-ii/ (corroboration)
- https://www.history.com/articles/world-war-ii-history (corroboration)