Ask for Military Assistance

is_available = is_at_war = yes
any_character_struggle = {
	involvement = involved
	has_struggle_phase_parameter = unlocks_contract_assistance_interaction
}
trigger_if = {
	limit = {
		is_ai = yes
	}
	gold >= ai_war_chest_desired_gold_value
	is_at_war = no
	is_imprisoned = no
}
is_shown = scope:actor = {
	NOR = {
		this = scope:recipient
		is_at_war_with = scope:recipient
	}
}
scope:recipient = {
	any_character_struggle = {
		involvement = involved
		has_struggle_phase_parameter = unlocks_contract_assistance_interaction
	}
}

As written in game/common/character_interactions/03_fp2_interactions.txt.

scope:recipient = {
	NOT = {
		is_allied_to = scope:actor
	}
}
trigger_if = {
	limit = {
		exists = scope:recipient.liege
	}
	custom_description = {
		text = join_war_interaction_recipient_warring_with_my_liege
		subject = scope:actor
		scope:recipient = {
			NOT = {
				any_liege_or_above = {
					is_at_war_with = scope:actor
				}
			}
		}
	}
}
scope:recipient = {
	has_raised_armies = no
}
custom_tooltip = {
	text = contract_assistance_war_already_contracted_tt
	scope:recipient = {
		NOT = {
			has_variable = owed_contract_assistance_war
		}
	}
}

As written in game/common/character_interactions/03_fp2_interactions.txt.

on_accept = scope:target = {
	hidden_effect = {
		set_called_to = scope:recipient
	}
	if = {
		limit = {
			is_attacker = scope:actor
		}
		add_attacker = scope:recipient
	}
	else = {
		add_defender = scope:recipient
	}
}
scope:recipient = {
	save_scope_as = contract_assistance_helper
	set_variable = {
		name = owed_contract_assistance_war
		value = scope:target
	}
	set_variable = {
		name = owed_contract_assistance_contribution
		value = offer_assistance_interaction_war_contribution_value
	}
	set_variable = {
		name = owed_contract_assistance_gold
		value = offer_assistance_interaction_gold_value
	}
	stress_and_fulfillment_impact = {
		craven = medium_stress_impact_gain
		shy = minor_stress_impact_gain
	}
	if = {
		limit = {
			any_character_struggle = {
				involvement = involved
				activate_struggle_catalyst_secondary_character_involvement_involved_trigger = {
					CATALYST = catalyst_join_war_as_assisant
					CHAR = scope:recipient
				}
			}
		}
		every_character_struggle = {
			involvement = involved
			limit = {
				activate_struggle_catalyst_secondary_character_involvement_involved_trigger = {
					CATALYST = catalyst_join_war_as_assisant
					CHAR = scope:recipient
				}
			}
			activate_struggle_catalyst = {
				catalyst = catalyst_join_war_as_assisant
				character = scope:recipient
			}
		}
	}
}
scope:actor = {
	stress_and_fulfillment_impact = {
		greedy = medium_stress_impact_gain
		arrogant = medium_stress_impact_gain
	}
	custom_description_no_bullet = {
		text = contract_assistance_interaction_condition_tt
		subject = scope:actor
		object = scope:recipient
	}
	show_as_tooltip = {
		pay_short_term_gold = {
			target = scope:recipient
			gold = offer_assistance_interaction_gold_value
		}
	}
}
add_clan_unity_interaction_effect = {
	CHARACTER = scope:actor
	TARGET = scope:recipient
	VALUE = medium_unity_loss
	DESC = clan_unity_request_assistance.desc
	REVERSE_NON_HOUSE_TARGET = no
}
on_decline = scope:actor = {
	trigger_event = char_interaction.0236
}
add_clan_unity_interaction_effect = {
	CHARACTER = scope:recipient
	TARGET = scope:actor
	VALUE = minor_unity_gain
	DESC = clan_unity_request_assistance_decline.desc
	REVERSE_NON_HOUSE_TARGET = no
}

As written in game/common/character_interactions/03_fp2_interactions.txt.