スクリプトトリガー
cossack_colonization_valid_neighbor_province_definition
定義in_game/events/estates/cossacks_estate_events.txt:210
211OR = {
212sub_continent = sub_continent:eastern_europe
213sub_continent = sub_continent:central_asia
214sub_continent = sub_continent:north_asia
}
216any_location_in_province_definition = {
217is_ownable = yes
218has_owner = no
}