When Sextus had managed to bring famine to Rome, in 39 BC, Octavian and Antony sought an alliance with him, appointing him governor of Sicily, Sardinia, and the Peloponnese for five years (Treaty of Misenum).
[1][2][3] Agrippa cut through part of the Via Ercolana and dug a channel to connect Lake Lucrinus to the sea in order to change it into a harbor.
Agrippa used his new weapon to great effect, succeeding in blocking the more maneuverable ships of Sextus and, after a long and bloody fight, in defeating his enemy.
[1][2][3] After seven years, Sicily was finally wrested from the control of the resourceful Sextus, whose large navy had created many problems for the Second Triumvirate.
Later, after a good amount of intrigue, Octavian was able to strip Lepidus of his political and military power and become the sole ruler of the west.