The Interventionists was an impromptu adventuring party founded by Cassandra during her time in Val Tanza.
Following the Attack on the Elleseandi Embassy, the group strived to prevent an Elleseandi invasion and to uncover and stop all conspirators involved.
Though seemingly unsuccessful, given the Siege of Val Tanza and subsequent Val Aregis - Val Tanza Alliance, the stories of the party, shared by only surviving member Apuccio, were vital to spark rebellion in Val Luno.