how many recorded instances exist of American settlers using diseased blankets against indians

GPT-5.4

Vote: exactly 1

The best-documented recorded case is the 1763 Fort Pitt incident, where British officers associated with Amherst’s war discussed and attempted giving smallpox-contaminated items, including blankets, to Native people. That is the one commonly cited concrete recorded instance. Claims that this happened many times are widespread, but historians generally note that hard documentary evidence for multiple separate blanket-transmission episodes is lacking. There were many devastating epidemics among Indigenous peoples, and sometimes broader biological warfare discussions, but not many clearly recorded blanket cases. Because the question asks for recorded instances, not rumors or possible cases, "exactly 1" is the strongest answer among the options given.

Grok 4.1 Fast

Vote: exactly 1

The most well-documented and recorded instance of using diseased blankets against Native Americans is the 1763 Fort Pitt incident during the Pontiac's Rebellion. British colonial officials, including Captain Simeon Ecuyer and Colonel Henry Bouquet (with approval from Jeffery Amherst), distributed smallpox-infected blankets to Delaware and Shawnee delegates. This is evidenced by primary sources like Ecuyer's journal and correspondence. No other verified, recorded instances by American settlers exist. Claims of additional events, such as during the Revolutionary War or later, lack contemporary documentation and are considered historical myths or exaggerations by scholars (e.g., as noted in works by Elizabeth Fenn and Philip Ranlet). Options B and C both claim 'more than 5,' which is incorrect; only one instance meets the criteria of being reliably recorded with primary evidence. Thus, A is the accurate choice.

Gemini 2.5 Flash

Vote: exactly 1

The most widely cited and historically documented instance of American settlers (or, more precisely, British officers in colonial America) using diseased blankets against Native Americans is the Fort Pitt incident during Pontiac's Rebellion in 1763. Correspondence between Lord Jeffrey Amherst and Colonel Henry Bouquet explicitly discusses the plan to send smallpox-infected blankets to the Native Americans besieging the fort. While the devastating spread of disease among Native populations due to European contact was widespread, this specific act of deliberate biological warfare using diseased blankets is primarily attributed to this single, well-recorded instance. Other similar claims are often less thoroughly documented or are based on broader disease transmission rather than explicit weaponized use of blankets.

Final Summary

The AI Roundtable reached a swift and unanimous consensus, identifying the 1763 Fort Pitt incident as the only historically verifiable instance of diseased blankets being used as a weapon. While acknowledging the widespread nature of smallpox among Indigenous populations, GPT-5.4, Grok 4.1 Fast, and Gemini 2.5 Flash all distinguished between documented military strategy and general epidemiological devastation. Grok 4.1 Fast provided the most rigid defense of this position, citing primary journals and scholarly work to dismiss more expansive claims as historical myths.

No agreement after 1 rounds of discussion. Final vote: exactly 1: 3

Strongest Arguments

• exactly 1: While many epidemics occurred, the 1763 Fort Pitt incident involving Captain Simeon Ecuyer and Colonel Henry Bouquet is the only case supported by primary documentary evidence, such as journals and specific military correspondence, rather than rumor or general epidemiological trends.