It turns out that principled pacifism is not the sole province of Mennonites. Jay Beaman and Brian Pipkin have uncovered a wealth of documents that testify to the peace commitments of other American religious groups. They have compiled them in a sourcebook entitled Pentecostal and Holiness Statements on War and Peace.
Did you know that Pentecostal denominations have not always been militaristic? For example, during WWI, Pentecostals widely professed pacifism, the active promotion of peace, and resisted participation in warfare.