Diodorus completes book XX of his Library at this point, saying that he will describe the battle between the Kings at the start of the next book. However, only fragments remain of books XXI onwards, and although some fragments of his description of the battle do remain, they do not form a coherent narrative. In his description of the battle, Plutarch does not describe the preliminary manoeuvring that must have occurred in 301 BC before the battle, so it is unclear how events unfolded. Lysimachus and Seleucus were probably anxious to bring Antigonus to battle, since their respective power-centres in Thrace and Babylon were vulnerable in their prolonged absence. The armies eventually met in battle around 50 miles north-east of Synnada, near the village of Ipsus. Antigonus was aware of Ptolemy's raid on Syria the previous year, and thus would have been loath to be cut off from Syria and his capital in Antigonia, and thus moved to intercept the allied army. The exact location of the battle is unknown, but it occurred in a large open plain, well-suited for both the allied preponderance of elephants and the Antigonid superiority in cavalry numbers and training.