Some facts I learned about the barbarians and their hordes. Be sure to add your own discoveries, thoughts etc 
Barbarians
Barbarians
- Have culture and religion of the very original values of their home province.
- Have civilization rating of their home province.
- Their power rises in the province continuously. At double rate in a colonized province (0.20/0.40).
- The rising chance is 5 x barbarian power in a province.
- They have civilization rating of the province they rised from.
- They have culture and religion of the original (474 AVC) stats of the province they risen from.
- Destroy Colonies.
- Dont destroy colonies with population 7+.
- Pillage civilization by difference between their civ and 50 times the number of cohorts.
- Barbies of civ rating 50+ dont pillage.
- Hoard gold from occupied and sieged provinces.
- Can be bashed for the gold they colected and 0.1 slaves per cohort.
- Can change unowned province religion and culture as they pass them.
- When they occupy all the provinces of a nation they take over, changing goverment to military tribe and country culture and religion to that of their horde. The horde cohorts become army of the conquered nation. This is not Game Over, as player still retain control of the nation. The provinces are not converted.
- When they occupy only some provinces of a nation they can be persuaded to create a client state under their own banner or they declare independence after some time anyway. All the new military tribe nation provinces are force converted to culture and religion of the barbarians.
- When they accept offer to settle you gain 0.2 freemen per cohort settled in the occupied provinces.
- They are more easily persuaded to accept your offer when you have bigger army next province. They are unlikely to accept the offer when the horde is currently retreating from a lost battle.