The Beachy Amish Mennonites are formally a subgroup of Amish but they are much less traditional than other Amish. Even though they have retained the name "Amish" they are quite different from the common idea of Amish: they do not use horse and buggy for transportation, with a few exceptions they do not speak Pennsylvania German anymore, nor do they have restrictions on technology except for radio and television. In the years 1946 to 1977 a majority was transformed into an evangelical revivalist denomination. The traditionalists who wanted to preserve the old Beachy Amish ways then withdrew and formed their own congregations. Today they are known as Midwest Beachy Amish Mennonites or Old Beachy Amish.
They form a loose association of churches without a central governing body; therefore, few common characteristics are shared by all Beachy congregations. Some similarities include adhering to the Dordrecht Confession of Faith and practicing varying degrees of Anabaptist practice, such as nonresistance, separation from the state, and adult baptism.
The Beachy church arose from a 1927 division in the (Casselman) River Old Order Amish congregation in Somerset County, Pennsylvania. Bishop Moses M. Beachy led the congregation during that time and his name became associated with the faction. The Beachys favored a milder discipline for members whose only offense was transferring membership to other Anabaptist churches, specifically the conservative Amish Mennonite congregation that broke from Moses Beachy's congregation (then not under Beachy's leadership) in 1895.
The Beachy Amish were transformed at mid-20th century into a more evangelical group by both the incorporation of revivalist Amish who had left their original churches and joined the Beachy Amish and by a growing revivalist influence within the Beachys.