Antony now found it impossible to continue the siege of Mutina, but he retreated in good order northward, crossed the Alps, and was well received in Farther Gaul by Lepidus, who had promised him support. Meantime the good understanding between Octavian and the Senate had come to an end. The latter, being resolved to prevent him from obtaining any farther power, gave the command of the Consular armies to D. Brutus; and Cicero talked of removing the boy. But the "boy" soon showed the Senate that he was their master. He gained the confidence of the soldiers, who gladly followed the heir of Caesar to Rome. Though only 20 years of age, he demanded of the Senate the Consulship. At first they attempted to evade his demand; but his soldiers were encamped in the Campus Martius, and in the month of August he was elected Consul with his cousin Q. Pedius. The first act of his Consulship showed that he had completely broken with the Senate. His colleague proposed a law declaring all the murderers of Caesar to be outlaws. Octavian then quitted Rome to march professedly against Antony, leaving Pedius in charge of the city; but it soon appeared that he had come to an understanding with Antony, for he had hardly entered Etruria before the unwilling Senate were compelled, upon the proposal of Pedius, to repeal the sentence of outlawry against Antony and Lepidus. These two were now descending the Alps at the head of 17 legions. Octavian was advancing northward with a formidable army. Between two such forces the situation of D. Brutus was hopeless. He was deserted by his own troops, and fled to Aquileia, intending to cross over to Macedonia, but was put to death in the former place by order of Antony. Lepidus, who acted as mediator between Antony and Octavian, now arranged a meeting between them on a small island near Bononia, formed by the waters of the River Rhenus, a tributary of the Po. The interview took place near the end of November. It was arranged that the government of the Roman world should be divided between the three for a period of five years, under the title of "Triumvirs for settling the affairs of the Republic."[71] Octavian received Sicily, Sardinia, and Africa; Antony the two Gauls, with the exception of the Narbonese district, which, with Spain, was assigned to Lepidus. Octavian and Antony were to prosecute the war against Brutus and Cassius, who were in possession of the eastern provinces. Lepidus was to receive the Consulship for the following year, with the charge of Italy.