Episode
Quebec's secret biological warfare history
- Podcast
- Explaining History
- Published
- Jun 25, 2026
- Duration seconds
- 2018
- Processing state
not_requested- Canonical source
- http://explaininghistory.org
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Summary
In this episode of the Explaining History Podcast, we are joined by award-winning French Canadian author Mireille Gagné to discuss her acclaimed novel, *Horsefly* – a powerful, genre-defying work inspired by a top‑secret biological warfare laboratory that operated on Québec's Grosse Île during the Second World War. The novel draws on a forgotten chapter of shared Allied history. In 1942, British, American, and Canadian forces established a clandestine facility on Grosse Île – an island in the St. Lawrence River that had previously served as a quarantine station for European immigrants. Their mission: to develop anthrax as a weapon of mass destruction, producing enough to kill the world's population thirty times over. The operation, known as Project M, was part of a broader effort that included the infamous Gruinard Island tests in Scotland – where anthrax spores rendered the island uninhabitable for decades. But Mireille's story is not primarily about scientists and generals. It is about the ordinary people – the residents of neighbouring islands, many of them French Canadian, who were recruited as labourers, caretakers, and assistants. They slaughtered cattle, handled organs, washed themselves with harsh red soap, and transported dangerous materials – often without understanding the full extent of the risks. They worked in silence, bound by military secrecy, and carried a heavy burden that they never fully spoke about. Mireille grew up on Île‑aux‑Grues, part of the same archipelago as Grosse Île. She heard fragments of these stories as a child – whispered, half‑remembered, dismissed by some as dementia. Her mother, who arrived on the island in the 1970s, tried to ask questions but was met with silence. It was only when Mireille began interviewing grandchildren that th…