The Faith and Order had a conflict with the Tang Empire, only with the Tang Empire. It happened on the first day of the tournament when they demanded The Emperor's wives, and on the last day when the leader of Faith and Order tried to rally more factions against The Tang Empire.
Then the next day the Faith and Order disappeared. That meant two things. First, the Faith and Order were obliterated by The Tang Empire. The Tang Empire killed all members and the faction disappeared.
Second, The Tang Empire forced them to disband their faction. The first one was an extreme choice, but it was something the Tang Empire was capable of doing and they might be doing it based on their records. Most of them hoped for the second one.