Battle of Ipsus

Battle of Ipsus
Part of the Wars of the Diadochi
Lysimachus, one of the victors of Ipsus
Date 301 BC Location Ipsus, Phrygia Result Decisive coalition victory
Belligerents
Antigonids	Lysimachids Antipatrids Seleucids
Commanders and leaders
Antigonus I Monophthalmus † Demetrius Poliorcetes	Lysimachus Seleucus I Nicator, Cassander Prepelaus Pleistarchus
Strength
70,000 infantry, 10,000 cavalry, 75 elephants	64,000 infantry, 15,000 cavalry, 400 elephants, 100 scythed chariots

The Battle of Ipsus (Ancient Greek: Ἱψός) was fought between some of the Diadochi (the successors of Alexander the Great) in 301 BC near the village of that name in Phrygia. Antigonus I Monophthalmus and his son Demetrius I of Macedon were pitted against the coalition of three other companions of Alexander: Cassander, ruler of Macedon; Lysimachus, ruler of Thrace; and Seleucus I Nicator, ruler of Babylonia and Persia.

Diodorus Siculus is the principal source for the history of the Diadochi, in his 'Library of history' (Bibliotheca historica). Diodorus is often derided by modern historians for his style and inaccuracies, but he preserves many details of the ancient period found nowhere else. Diodorus worked primarily by epitomizing the works of other historians, omitting many details where they did not suit his purpose, which was to illustrate moral lessons from history However, since Diodorus provides the only continuous narrative for the history of the Diadochi, we have no alternative but to rely on his account. Unfortunately, from book XXI onwards (301 BC), including the actual Battle of Ipsus, the Bibliotheca only exists in fragments. Nevertheless, Diodorus provides extensive details of the Fourth War of the Diadochi leading up to Ipsus. It is generally thought that Diodorus's source for much of this period was the now-lost history of the Diadochi written by Hieronymus of Cardia. Hieronymus was a friend of Eumenes, and later became a member of the Antigonid court; he was therefore very much familiar and contemporary with the events he described, and possibly a direct eyewitness to some.

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