Belisarius has only just taken Neapolis when the king of the Ostrogoths is overthrown. The new king, Vitiges, withdraws from Rome entirely to consolidate his power, allowing Belisarius to take Rome without a fight. But after Vitiges gathers his troops, he marches to retake Rome. He springs a surprise attack on Belisarius at the Salarian Bridge, which the Roman general barely escapes. Now he must survive in a city under siege, invening ship mills to continue producing the grain that feeds the city and training the civilians as soldiers. He holds off the Ostrogoths until reinforcements from Justinian arrive. After an indecisive battle, he agrees to a truce with Vitiges, which gives him time to position his troops. When the Ostrogoths break the truce, Belisarius is ready for them and crushes their force to drive them finally out of Rome.