The first sentence of the book Massacre at Mountain Meadows sums it up perfectly.
"On September 11, 1857, Mormon settlers in southern Utah used a false flag of truce to lull a group of California-bound emigrants from their circled wagons and then slaughtered them. When the killing was over, more than one hundred butchered bodies lay strewn across a half-mile stretch of an upland meadow. Most of the victims were women and children."
