In April 1815, the eruption of Mount Tambora in modern-day Indonesia spewed millions of tons of volcanic ash and sulfur dioxide high into the stratosphere. The resulting volcanic winter swept across the Northern Hemisphere in 1816, creating what terrified locals dubbed Eighteen Hundred and Freeze to Death. In Vermont, where fine-wool Merino sheep farming was booming, the environmental disruption was catastrophic.
Heavy snowfall struck New England in June, followed by severe killing frosts in July and August that froze crops solid in the fields. The unpredictable cold spells severely disrupted forage distribution for livestock. Pasture grasses withered under persistent frost and snow, depriving Vermont sheep of essential summer forage.
Starving farmers were forced to graze their flocks on spruce needles, bark, and meager brush, leading to mass livestock deaths. Wool yields plummeted, and the forage collapse triggered widespread rural panic. Unable to feed their prized sheep through the summer months, thousands of Vermont families abandoned their rocky hill farms and migrated west toward the fertile Ohio River Valley.
This ecological disaster accelerated the westward expansion of the United States and permanently altered New England's agricultural landscape.