Gustive O. Larson gives an overview of the Mormon Reformation of 1856-7.
Gustive O. Larson, "The Mormon Reformation," Utah Historical Quarterly 26, no. 1 (1958): 46
By means of public exhortations and cathechizing in private, the soul-searching process swept over Mormondom at home and abroad in 1856 and early 1857, until every Saint was rededicated to "the Kingdom" through repaptism or purged from membership. It was an emotional experience which regenerated the earth-bound masses spiritually to knit them into a more self-conscious brotherhood. It was a drive for unity against a threatening world.