 Complete the following phrase:  Caudex first secured control of the city with ease. However, Syracuse and Carthage, at war for centuries, made an alliance to counter the invasion and blockaded Messina, but Caudex defeated Hiero and Carthage separately. His successor Manius Valerius Corvinus Messalla landed with a strong 40,000 men army that conquered eastern Sicily, which prompted Hiero to shift his allegiance and forge a long lasting alliance with Rome. In 262, the Romans moved to the southern coast and besieged Akragas. In order to raise the siege, Carthage sent reinforcements, including 60 elephants  the first time they used them, but still lost the battle. Nevertheless, as Pyrrhus before, Rome could not take all of Sicily because Carthages naval superiority prevented them from effectively besieging coastal cities, which could receive supplies from the sea. Using a captured Carthaginian ship as blueprint, Rome therefore launched a massive construction program and built 100 quinqueremes in only two months, perhaps through an assembly line organisation. They also invented a new device, the corvus, a grappling engine which enabled a crew to board on an enemy ship. The consul for 260 Scipio Asina lost the first naval skirmish of the war against Hannibal Gisco at Lipara, but his colleague Gaius Dullius won a 