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In the default 9,0c there is an error in the probabilty setting for the start of Cali recruitment.  Open your Conquest 9.0c folder. Now edit this file src\core\variables,gd in a text editor (I use Notebook++) Seach for dungeon_unique_encounter_chance. Change the value from 0.1 to 0.5 . You can set to any value less than 1.0 but 0.5 is reasonable and reliably generates the Cali start. 

It's a random room event you find the paper in within a bandit fort. I found it after doing like 5 forts. So it still works, but it's just harder to obtain.