mpo_overrunner_becomes_tribal_trigger

mpo_overrunner_becomes_tribal_trigger = {
	scope:target = {
		any_de_jure_county = {
			holder.top_liege = scope:defender
			add_to_temporary_list = target_counties
		}
	}
	OR = {
		#Defender is tribal and holds title
		AND = {
			scope:target = {
				holder ?= scope:defender
			}
			scope:defender = {
				government_has_flag = government_is_tribal
			}
		}
		#Defender is tribal and all counties they hold are tribal
		AND = {
			scope:defender = {
				government_has_flag = government_is_tribal
			}
			any_in_list = {
				list = target_counties
				count >= all
				any_county_province = {
					OR = {
						has_holding_type = tribal_holding
						has_holding_type = nomad_holding
						has_holding_type = herder_holding
					}
				}
			}
		}
		#New capital county will be tribal
		trigger_if = {
			limit = {
				scope:target = {
					title_capital_county = {
						holder.top_liege = scope:defender
					}
				}
			}
			scope:target = {
				title_capital_county = {
					holder.top_liege = scope:defender
					any_county_province = {
						is_county_capital = yes
						OR = {
							has_holding_type = tribal_holding
							has_holding_type = nomad_holding
							has_holding_type = herder_holding
						}
					}
				}
			}
		}
		#New potential duchy capitals are tribal
		trigger_else_if = {
			limit = {
				scope:target = {
					any_direct_de_jure_vassal_title = {
						tier = tier_duchy
						title_capital_county = {
							holder.top_liege = scope:defender
						}
					}
				}
			}
			scope:target = {
				any_direct_de_jure_vassal_title = {
					count = all
					tier = tier_duchy
					title_capital_county = {
						holder.top_liege = scope:defender
						any_county_province = {
							is_county_capital = yes
							has_holding = yes
							NOR = {
								has_holding_type = tribal_holding
								has_holding_type = nomad_holding
								has_holding_type = herder_holding
							}
						}
					}
				}
			}
		}
		#Every county is tribal
		trigger_else = {
			scope:target = {
				any_de_jure_county = {
					count >= all
					holder.top_liege = scope:defender
					any_county_province = {
						is_county_capital = yes
						NOR = {
							has_holding_type = tribal_holding
							has_holding_type = nomad_holding
							has_holding_type = herder_holding
						}
					}
				}
			}
		}
	}
}

As written in game/common/scripted_triggers/mpo_scripted_triggers.txt.