"The Anabasis of Alexander" by Arrian of Nicomedia is a military history composed in the second century AD. This seven-book account chronicles Alexander the Great's conquest of the Persian Empire between 336 and 323 BC, from his accession to the Macedonian throne through his death. Drawing on lost sources from Alexander's companions, Arrian presents the fullest surviving narrative of these legendary campaigns, including famous battles at Granicus, Issus, and Gaugamela, sieges across Asia, and the ambitious push into India that ultimately ended at the Hyphasis river. (This is an automatically generated summary.)