The Romans elected two new consuls in 148 BCE, but only one of them was sent to Africa: Calpurnius Piso; Lucius Hostilius Mancinus commanded the navy as his subordinate. He pulled back the close siege of Carthage to a looser blockade and attempted to mop up the other Carthaginian-supporting cities in the area. He failed: Neapolis surrendered and was subsequently sacked, but Aspis withstood assaults from both the Roman army and navy, while Hippo was fruitlessly besieged. A Carthaginian sortie from Hippo destroyed the Roman siege engines causing them to break off the campaign and go into winter quarters. Hasdrubal, already in charge of the Carthaginian field army, overthrew the civilian leadership of Carthage and took command himself. Carthage allied with Andriscus, a pretender to the Macedonian throne. Andriscus had invaded Roman Macedonia, defeated a Roman army, had himself crowned King Philip VI, and sparked the Fourth Macedonian War.