The more probable cause of disrupted agriculture and widespread famine is a volcanic eruption with a rapid, dramatic cooling. https://en.wikipedia.org/wiki/Year

The more probable cause of disrupted agriculture and widespread famine is a volcanic eruption with a rapid, dramatic cooling. https://en.wikipedia.org/wiki/Year_Without_a_Summer https://en.wikipedia.org/wiki/Year_Without_a_Summer https://en.wikipedia.org/wiki/Volcanic_winter https://en.wikipedia.org/wiki/Volcanic_winter