Offer to Join War

is_shown = scope:recipient = {
	is_at_war = yes
	NOR = {
		this = scope:actor
		is_at_war_with = scope:actor
	}
}

As written in game/common/character_interactions/00_alliance.txt.

trigger_if = {
	limit = {
		exists = scope:actor.liege
	}
	custom_description = {
		text = join_war_interaction_recipient_warring_with_my_liege
		subject = scope:recipient
		scope:actor = {
			NOT = {
				any_liege_or_above = {
					is_at_war_with = scope:recipient
				}
			}
		}
	}
}
trigger_if = {
	limit = {
		scope:actor = {
			target_is_vassal_or_below = scope:recipient
		}
	}
	custom_description = {
		text = join_war_interaction_recipient_not_fighting_peasant_faction
		subject = scope:recipient
		scope:recipient = {
			any_war_enemy = {
				is_leading_faction_type = peasant_faction
			}
		}
	}
}
trigger_else_if = {
	limit = {
		scope:actor.faith = scope:recipient.faith
		scope:recipient = {
			any_character_war = {
				OR = {
					using_cb = pam_challenge_hof_cb
					AND = {
						using_cb = pam_antiking_cb
						scope:actor.religious_head_or_challenger ?= scope:recipient
					}
				}
			}
		}
	}
}
trigger_else_if = {
	limit = {
		scope:actor = {
			NOT = {
				target_is_liege_or_above = scope:recipient
			}
		}
	}
	trigger_if = {
		limit = {
			scope:actor = {
				has_government = landless_adventurer_government
			}
		}
		scope:recipient = {
			trigger_if = {
				limit = {
					any_character_war = {
						has_variable_list = left_voluntarily
					}
				}
				custom_tooltip = {
					text = laamp_war_change_sides_interaction.left_voluntarily
					is_target_in_variable_list = {
						name = left_voluntarily
						target = scope:actor
					}
				}
			}
		}
	}
	trigger_else_if = {
		limit = {
			scope:recipient = {
				any_character_war = {
					OR = {
						scope:recipient.faith = scope:actor.faith
						AND = {
							scope:recipient.faith.religion = scope:actor.faith.religion
							scope:actor.faith = {
								faith_hostility_level = {
									target = scope:recipient.faith
									value < religious_cb_enabled_hostility_level
								}
							}
						}
						AND = {
							scope:recipient = {
								target_is_liege_or_above = scope:actor
							}
							casus_belli = {
								any_target_title = {
									holder = {
										OR = {
											this = scope:actor
											is_vassal_or_below_of = scope:actor
										}
									}
								}
							}
						}
					}
					any_war_defender = {
						this = scope:recipient
					}
				}
			}
		}
	}
	trigger_else_if = {
		limit = {
			fp2_struggle_conciliation_recipient_actor_involved_trigger = yes
			scope:recipient = {
				any_character_war = {
					primary_defender = scope:recipient
					primary_attacker = {
						save_temporary_scope_as = attacker_temp
					}
					fp2_struggle_conciliation_scope_uninvolved_trigger = {
						SCOPE = scope:attacker_temp
					}
				}
			}
		}
	}
	trigger_else_if = {
		limit = {
			exists = scope:recipient.confederation
			scope:actor = {
				is_member_of_confederation = scope:recipient.confederation
			}
		}
		scope:actor = {
			is_member_of_confederation = scope:recipient.confederation
		}
	}
	trigger_else_if = {
		limit = {
			scope:recipient = {
				is_tributary_of_suzerain_or_above = scope:actor
			}
		}
		custom_tooltip = {
			text = join_war_interaction_recipient_tributary_no_defensive_war
			scope:recipient = {
				any_character_war = {
					primary_defender = scope:recipient
				}
			}
		}
	}
	trigger_else_if = {
		limit = {
			scope:actor = {
				is_tributary_of = scope:recipient
			}
		}
		custom_tooltip = {
			text = join_war_interaction_recipient_tributary_no_defensive_war
			scope:recipient = {
				any_character_war = {
					primary_defender = scope:recipient
				}
			}
		}
	}
	trigger_else = {
		custom_description = {
			text = join_war_interaction_recipient_not_ally
			subject = scope:recipient
			scope:recipient = {
				is_allied_to = scope:actor
			}
		}
	}
}
trigger_else = {
	custom_description = {
		text = join_war_interaction_recipient_not_liege
		subject = scope:recipient
		scope:actor = {
			target_is_liege_or_above = scope:recipient
		}
	}
}
scope:actor = {
	trigger_if = {
		limit = {
			has_government = landless_adventurer_government
		}
		custom_tooltip = {
			text = reinforce_soldiers_any_regiment_tt
			maa_regiments_count >= 1
		}
	}
}
custom_tooltip = {
	text = the_wake_1
	NOT = {
		is_laamp_exiled_from_province_trigger = {
			PROVINCE = scope:recipient.capital_province
			LAAMP = scope:actor
		}
	}
}

As written in game/common/character_interactions/00_alliance.txt.

on_accept = scope:target ?= {
	hidden_effect = {
		set_called_to = scope:actor
	}
	if = {
		limit = {
			is_attacker = scope:recipient
		}
		add_attacker = scope:actor
		if = {
			limit = {
				OR = {
					scope:actor = {
						any_home_court_hostage = {
							warden ?= {
								is_defender_in_war = scope:target
							}
						}
					}
					scope:target = {
						any_war_defender = {
							any_warden_hostage = {
								home_court ?= scope:actor
							}
						}
					}
				}
			}
			custom_tooltip = hostage_execution_warning_tt
		}
	}
	else = {
		add_defender = scope:actor
		if = {
			limit = {
				OR = {
					scope:actor = {
						any_home_court_hostage = {
							warden ?= {
								is_attacker_in_war = scope:target
							}
						}
					}
					scope:target = {
						any_war_attacker = {
							any_warden_hostage = {
								home_court ?= scope:actor
							}
						}
					}
				}
			}
			custom_tooltip = hostage_execution_warning_tt
		}
	}
	if = {
		limit = {
			is_religious_war = yes
			scope:actor = {
				any_active_accolade = {
					accolade_parameter = acclaimed_knight_piety_from_battle
				}
			}
		}
		scope:actor = {
			add_piety = medium_piety_gain
		}
	}
	if = {
		limit = {
			is_religious_war = yes
			scope:actor = {
				any_active_accolade = {
					accolade_parameter = acclaimed_knight_piety_from_battle_high
				}
			}
		}
		scope:actor = {
			add_piety = major_piety_gain
		}
	}
}
scope:actor = {
	stress_and_fulfillment_impact = {
		craven = medium_stress_impact_gain
	}
	add_to_variable_list = {
		name = joined_as_ally
		target = scope:target
	}
}
scope:recipient = {
	show_as_tooltip = {
		if = {
			limit = {
				is_ai = yes
			}
			progress_towards_friend_effect = {
				CHARACTER = scope:actor
				OPINION = 0
				REASON = friend_alliance
			}
		}
		else = {
			hidden_effect = {
				if = {
					limit = {
						NOR = {
							has_relation_friend = scope:actor
							has_relation_potential_friend = scope:actor
						}
					}
					set_relation_potential_friend = scope:actor
				}
			}
		}
	}
}
if = {
	limit = {
		exists = scope:target
		scope:target = {
			OR = {
				AND = {
					primary_attacker = scope:recipient
					scope:recipient.house = scope:actor.house
					primary_defender = {
						house != scope:actor.house
					}
				}
				AND = {
					primary_defender = scope:recipient
					scope:recipient.house = scope:actor.house
					primary_attacker = {
						house != scope:actor.house
					}
				}
			}
		}
	}
	add_clan_unity_interaction_effect = {
		CHARACTER = scope:actor
		TARGET = scope:recipient
		VALUE = medium_unity_gain
		DESC = clan_unity_join_war.desc
		REVERSE_NON_HOUSE_TARGET = no
	}
}
on_decline = scope:actor = {
	trigger_event = char_interaction.0236
}

As written in game/common/character_interactions/00_alliance.txt.