Mountain Meadows massacre: Mormon settlers slaughter most members of a peaceful emigrant wagon train.

Mountain Meadows Massacre

1857 massacre of California-bound immigrants by Nauvoo Legion militiamen

The Mountain Meadows Massacre was a series of attacks during the Utah War that resulted in the mass murder of at least 120 members of the Baker–Fancher wagon train. The massacre occurred in the southern Utah Territory at Mountain Meadows, and was perpetrated by settlers from the…