On Actions

Overview[edit | edit source]

On Actions are effects that are triggered by hardcoded actions, like a button being pressed. They are found in /Europa Universalis IV/common/on_actions. Unlike ck2, eu4's On Actions do not combine and editing specific on actions in new files requires copying over the vanilla content.

On Actions support a list of events to trigger. Use the events' own trigger to restrict when they actually do.

   events = {
       my_event.1
       my_event.2
   }

Alternatively, events can also be triggered directly in the On Action's effect.

On Actions also support a list of events of which exactly one happens randomly, similar to a random list.

   random_events = {
       200 = my_event.1
       300 = my_event.1
       500 = 0
   }

Event id "0" is used as a 'no event' case.

Random event list events should have both `is_triggered_only = yes` and a `mean_time_to_happen` of **`days = 1`**. This mean time to happen works differently than usual - here, modifiers that increase the MTTH time will **multiply** the random event weight, making it **more likely** for the event to happen. Similar to adding chance modifiers to a random_list.

List[edit | edit source]

On Action	Description	ROOT	THIS	FROM	Notes
on_abandon_colony	Fired right before the colony is abandoned.	location		country	country refers to who abandoned it
on_accept_tribute		country		overlord
on_add_pasha
on_added_to_trade_company		location		country
on_adm_development		location
on_admiral_recruited		country
on_annexed		annexing country		annexed country
on_bankruptcy		country
on_battle_lost_country		loser country		winner country
on_battle_lost_province		location		winner country
on_battle_lost_unit		unit
on_battle_won_country		winner country		loser country
on_battle_won_province		location		loser country
on_battle_won_unit		unit
on_become_free_city		country
on_bi_yearly_pulse
on_bi_yearly_pulse_2
on_bi_yearly_pulse_3
on_bi_yearly_pulse_4
on_bi_yearly_pulse_5
on_buy_religious_reform		country
on_center_of_trade_downgrade	Fired when center of trade is downgraded.	location
on_center_of_trade_upgrade	Fired when center of trade is upgraded.	location
on_change_hre_religion
on_change_revolution_target			country	country	THIS = new target, FROM = previous target
on_chinese_empire_dismantled	Fired when Chinese Emperor is annexed.	country		country	ROOT = annexing country, FROM = emperor
on_circumnavigation
on_colonial_liberation		country
on_colonial_pulse
on_colonial_reintegration		country
on_colonial_type_change
on_company_chartered		location		country	FROM = previous country
on_company_disolved		location		country
on_company_formed		location		country
on_conquest		location		previous owner
on_conquistador_empty
on_conquistador_native
on_conquistador_recruited		country
on_consecrate_patriarch		location
on_convert_by_trade_policy			location	country	FROM = country who propogated
on_country_creation
on_country_released			country	overlord
on_create_client_state			country	overlord
on_create_vassal		country		overlord
on_culture_promoted
on_death_election		country
on_death_foreign_slave_ruler		country
on_death_has_harem		country
on_dependency_gained		overlord		subject
on_dependency_lost		overlord		subject
on_dip_development		location
on_diplomatic_annex
on_dismantle_revolution			loser country	winner country	loser country = rev. country, winner country = peace treaty enforcer
on_embrace_revolution		country
on_emperor_elected		country		country	ROOT = New Emperor, FROM = Previous Emperor
on_enforce_rebel_demands		country
on_estate_led_regency		country
on_estate_led_regency_surpassed		country
on_explore_coast		location		country	ROOT = discovered province, FROM = country doing the exploring
on_explorer_recruited		country
on_extend_regency		country
on_extended_regency
on_federation_leader_change
on_fetishist_cult_change		country
on_five_year_pulse
on_five_year_pulse_2
on_five_year_pulse_3
on_five_year_pulse_4
on_flagship_captured		country		country	ROOT = who captured, FROM = who lost
on_flagship_destroyed		country		country	ROOT = who destroyed, FROM = who lost
on_four_year_pulse
on_four_year_pulse_2
on_four_year_pulse_3
on_four_year_pulse_4
on_gain_great_power_status		country
on_general_recruited		country
on_golden_bull_enacted			country		THIS = curia controller
on_government_change		country
on_grant_estate_land		location
on_great_project_constructed		location		country	FROM = country that owns it
on_harmonized_buddhism		country
on_harmonized_christian		country
on_harmonized_dharmic		country
on_harmonized_jewish_group		country
on_harmonized_mahayana		country
on_harmonized_muslim		country
on_harmonized_pagan		country
on_harmonized_shinto		country
on_harmonized_vajrayana		country
on_harmonized_zoroastrian_group		country
on_heir_death		country
on_heir_needed_theocracy		country
on_holy_order_established		country
on_hre_defense
on_hre_member_annexed
on_hre_member_false_religion
on_hre_member_true_religion
on_hre_non_defense
on_hre_province_reconquest
on_hre_released_vassal
on_hre_religion_white_peace
on_hre_transfered_vassal
on_hre_wins_defensive_war
on_integrate
on_janissaries_raised			location
on_leader_recruited		country
on_loan_repaid			country
on_lock_hre_religion
on_lose_great_power_status		country
on_mandate_of_heaven_gained		country		country	ROOT = new emperor, FROM = old emperor
on_mandate_of_heaven_lost		country		country	ROOT = old emperor, FROM = new emperor
on_mercenary_recruited		country	location	unit
on_mil_development		location
on_minority_expelled		location	location	location	FROM = home province
on_monarch_death		country
on_monthly_pulse					this fires every day
on_native_change_government		country
on_new_consort		country
on_new_heir		country
on_new_monarch		country			can be called for Personal Union juniors as well
on_new_term_election		country
on_overextension_pulse
on_parliament_debate_failed		country
on_parliament_debate_succeeded		country
on_peace_actor		country
on_peace_recipient		country
on_pillaged_capital		country		country	ROOT = country pillaging, FROM = country pillaged
on_post_adm_advisor_fired			country
on_post_dip_advisor_fired			country
on_post_mil_advisor_fired			country
on_pre_adm_advisor_fired			country
on_pre_dip_advisor_fired			country
on_pre_mil_advisor_fired			country
on_province_culture_converted		location
on_province_owner_change		location		country	FROM = old owner
on_province_religion_converted		location
on_queen_death		country
on_raid_coast			country	location	THIS = raiding country
on_rebels_break_country			country
on_reform_changed
on_reform_enacted
on_refuse_tribute		subject		overlord
on_regent		country
on_regiment_recruited			location	country
on_released_hre_member
on_religion_change		country
on_remove_free_city
on_remove_pasha
on_removed_from_company		location		country	FROM = country doing it
on_replace_governor		country
on_revoke_estate_land
on_revoke_estate_land_ai
on_revoke_estate_land_ai_post
on_revoke_estate_land_post
on_revolutionary_guard_raised
on_russian_oprichnina
on_russian_streltsy
on_russian_sudebnik
on_secondary_religion_change		country
on_select_heir_from_harem
on_siberian_pulse
on_siege_lost_country		loser country		location
on_siege_lost_province		location		winner country
on_siege_won_country		winner country		location
on_siege_won_province		location		loser country
on_startup		country
on_successive_emperor
on_thri_yearly_pulse
on_thri_yearly_pulse_2
on_thri_yearly_pulse_3
on_thri_yearly_pulse_4
on_trade_company_investment
on_trade_good_changed		location		country
on_transfer_development		country		country	ROOT = country doing transfer, FROM = country dev was transferred from
on_war_lost		loser country		winner country
on_war_won		winner country		loser country
on_weak_heir_claim		country