Do you remember the blurb, the log line, the primer for [the Kr'Thak]?

The original thing was that basically they were not mortal enemies of the Xi'an, but they were basically located on the opposite side of the Xi'an Empire from the UEE. But they had been locked in a very, very long war with the Xi'an called the Spirit Wars, and the Xi'an were very, very cagey about telling us anything about them and really wanting to make sure that we didn't make contact with them. That was the original pitch set up for them.