mpo_nomad_invasion_war_ai_trigger

mpo_nomad_invasion_war_ai_trigger = {
	OR = {
		has_realm_law = nomadic_authority_3
		has_realm_law = nomadic_authority_4
		has_realm_law = nomadic_authority_5
	}
	is_independent_ruler = yes
	is_at_war = no
	gold > 0
	NOT = {
		has_realm_law = uncrowned
	}
	OR = {
		#China is in division
		AND = {
			situation:dynastic_cycle ?= { situation_current_phase = situation_dynastic_cycle_phase_chaos }
			NOT = {
				exists = title:h_china.holder
			}
			capital_province = {
				geographical_region = world_steppe_east
			}
		}
		#Byzantium or China are actually somehow a viable target
		title:e_byzantium.holder ?= {
			in_diplomatic_range = $NOMAD$
			NOR = {
				has_any_good_relationship_with_character_trigger = { CHARACTER = $NOMAD$ }
				is_allied_to = $NOMAD$
				is_tributary_of = $NOMAD$
				$NOMAD$ = {
					is_tributary_of_suzerain_or_above = prev
				}
				$NOMAD$ = {
					has_truce = prev
				}
			}
			#Fulfills strength comparison
			current_military_strength < $NOMAD$.seventy_percent_of_current_military_strength
			OR = {
				gold <= $NOMAD$.fifty_percent_of_current_gold
				current_military_strength <= $NOMAD$.forty_percent_of_current_military_strength
			}
		}
		title:h_china.holder ?= {
			in_diplomatic_range = $NOMAD$
			NOR = {
				has_any_good_relationship_with_character_trigger = { CHARACTER = $NOMAD$ }
				is_allied_to = $NOMAD$
				is_tributary_of = $NOMAD$
				$NOMAD$ = {
					is_tributary_of_suzerain_or_above = prev
				}
				$NOMAD$ = {
					has_truce = prev
				}
			}
			#Fulfills strength comparison
			current_military_strength < $NOMAD$.seventy_percent_of_current_military_strength
			OR = {
				gold <= $NOMAD$.fifty_percent_of_current_gold
				current_military_strength <= $NOMAD$.forty_percent_of_current_military_strength
			}
		}
		# Havsaran zud? Leave the steppe!
		capital_county ?= {
			any_county_situation_sub_region = {
				situation_sub_region_has_county = prev
				sub_region_current_phase = situation_steppe_havsarsan_zud_season
			}
		}
		#Landless and heavily herded
		AND = {
			is_landed = no
			domicile.herd >= 8000
		}
		#Family has held title without ascendance for a while
		AND = {
			ai_energy > low_negative_ai_value
			is_gurkhan = no
			sub_realm_size <= 30
			domicile ?= { herd <= two_thirds_max_herd_value }
			
			exists = $NOMAD$.house
			primary_title = {
				previous_holder ?= {
					house ?= $NOMAD$.house
				}
				any_past_holder = {
					count >= 2
					NOT = {
						this = $NOMAD$
					}
					house ?= $NOMAD$.house
					trigger_if = {
						limit = {
							is_alive = no
						}
						time_since_death = {
							years <= 120
						}
					}
				}
			}
		}
		#Is "pushed out" by stronger neighbor
		AND = {
			ai_vengefulness < low_positive_ai_value
			is_gurkhan = no
			any_neighboring_realm_with_tributaries_owner = {
				NOT = { is_tributary_of_suzerain_or_above = $NOMAD$ }
				OR = {
					#Is personally scary
					AND = {
						government_has_flag = government_is_nomadic
						seventy_percent_of_current_military_strength >= $NOMAD$.current_military_strength
						NOR = {
							is_allied_to = $NOMAD$
							has_truce = $NOMAD$
						}

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