The Louisiana Purchase nearly doubled the size of the United States.
Notes on verification
Well-corroborated by National Geographic, National Archives, Britannica, and Monticello; commonly taught historical fact. [cascade flags: aggregator_dropped_primary_exists | tier=silver indep_score=0.867 clusters=3 claim_tier=everyday] [auto_resolver_v1_8 run=13071dc8] promoting archives.gov (Tier A) as primary | LLM: The page explicitly states that the Louisiana Purchase nearly doubled the size of the United States.
Sources
- How the Louisiana Purchase Changed the World (seed:history_and_archaeology)
- https://www.archives.gov/exhibits/american_originals/loupur.html (corroboration)
- https://www.nationalgeographic.com/history/article/louisiana-purchase-bargain-came-great-human-cost (corroboration)
- https://www.monticello.org/thomas-jefferson/louisiana-lewis-clark/the-louisiana-purchase/ (corroboration)