Sheridan said:
Generally, you gain BB only for declaring war or gaining territory (how much is determined by the details), and it will slowly reduce over time automatically (the speed varies) and may also reduce if you lose territory.
Since we're gonna anticipate, I'll take on.
Actions earning you some BB :
DoW (Declaration of War) :
- with a CB (Casus Belli) : 1 BB
- without a CB : 4 BB
- against a pagan country (if you're european) : 0 BB
Taking provinces in peace-deals :
- core provinces : 0 BB
- colonies and TPs : 0 BB
- in defensive war : 1 BB
- in offensive war : 2 BB
- from pagan country (if you're european) : 0 BB
Force-annexing a country :
- from the same religion-group : 6 BB
- from a different religion-group : 3 BB
- pagan country (if you're european) : 0 BB
Diplo-annexation :
- 1 BB per province
Inheritance (thus, only by events) :
- 0.25 BB per province
Actions making you lose BB :
Releasing a vassal : 1 BB per province
Loosing a province in a war : 1 BB per province (unless it's a core province)
Random event : Diplomatic Fame event decreases BB by 1
Natural yearly decrease of BB :
At Normal or lower difficulty settings : monarch's DIP-skill divided by 20
At Hard difficulty setting : monarch's DIP-skill divided by 30
At Very Hard difficulty setting : monarch's DIP-skill divided by 40
