The Laki Fissure Eruption was a volcanic event in Iceland in 1783 lasted for months, leading to the deaths of thousands of people and affecting the climate in a lot of the world.
Research:

SYMHC Classics: Sarah Bradlee Fulton
32:28

Behind the Scenes Minis: Stairs and Trains
29:25

Elizabeth Blackwell's Curious Herbal
34:51