A second problem later arose showing the need for the Second Settlement in what became known as the "Marcus Primus Affair". In late 24 or early 23 BC, charges were brought against Marcus Primus, the former proconsul (governor) of Macedonia, for waging a war without prior approval of the Senate on the Odrysian kingdom of Thrace, whose king was a Roman ally. He was defended by Lucius Lucinius Varro Murena, who told the trial that his client had received specific instructions from Augustus, ordering him to attack the client state. Later, Primus testified that the orders came from the recently deceased Marcellus.