51 Equally conspicuous for fortitude were the many, both clergy and laity, of the eparchy of Chelm, who with unconquerable courage resisted the persecutors of the Catholic faith. For example, when troops came to seize their church and hand it over to the schismatics, the inhabitants of Pratolin did not resist force by force, but, unarmed, put their crowded bodies in the way of their attackers like a living wall; some were wounded and savagely ill-treated, some suffered long imprisonment or were deported to the icy regions of Siberia, some, finally, were put to the sword and shed their blood for Christ. The cause of those who sealed their Catholic faith by death has been begun in their eparchy, and so there is hope that at length it may be permitted to number them among the blessed. These iniquitous crimes were not, however, perpetrated in only one place, but in many cities, towns and villages. First, all the churches of the Catholics were handed over to the followers of schism, all the clergy driven from their places and forced to leave unguarded the flock committed to them. Then the faithful, with no account taken of their own wishes, were enrolled in the dissident Church. However, although orphaned of their pastors and deprived of the offices and helps of their religion, they made supreme efforts to hold fast to their faith. Thus it was that later when members of the Society of Jesus secretly went to them, in disguise and at the peril of their lives, to instruct, to exhort and to comfort them, they welcomed them with the greatest joy and devotion.
Source: Orientales Omnes Ecclesias (Vatican.va)