refill_maa_with_herd_effect

refill_maa_with_herd_effect = {
	save_scope_as = nomad_temp
	while = {
		limit = {
			scope:actor.domicile.herd > 0
			any_maa_regiment = {
				maa_regiments_valid_to_refill_trigger = yes
			}
		}
		random_maa_regiment = {
			limit = {
				maa_regiments_valid_to_refill_trigger = yes
			}
			save_scope_as = maa_scope
			save_scope_value_as = {
				name = current_herd_max_value_scope
				value = scope:actor.domicile.herd
			}
			scope:actor.domicile ?= {
				change_herd = {
					value = {
						add = scope:maa_scope.replenishable_troops_value
						divide = herd_refill_value
						max = scope:current_herd_max_value_scope
						multiply = -1
					}
				}
			}
			change_maa_troops_count = replenishable_troops_with_herd_value
		}
	}
}

As written in game/common/scripted_effects/09_dlc_mpo_scripted_effects.txt.