C´est dans le descr_strat :
campaign imperial_campaign
playable
england
france
hre
spain
venice
sicily
milan
scotland
byzantium
russia
moors
turks
egypt
denmark
portugal
poland
hungary
end
unlockable
end
nonplayable
papal_states
aztecs
mongols
timurids
slave
end
start_date 1100 summer
end_date 1532 winter
timescale 2.00
marian_reforms_disabled
rebelling_characters_active
gladiator_uprising_disabled
night_battles_enabled
show_date_as_turns
brigand_spawn_value 30 <====
pirate_spawn_value 42 <====
Il suffit de modifier ces deux valeurs.