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Alexander's successors: chronology of the Diadochi
Map of the Persian empire. Design Jona Lendering.
(©**)
 Diadochi ('successors'): name of the first generation of military and political leaders after the death of the Macedonian king and conqueror Alexander the Great in 323. To settle the question whether his empire should disintegrate or survive as a unity, and, if so, under whose rule, they fought several full-scale wars. The result, reached by 300, was a division into three large parts, which more or less coincided with Alexander's possessions in Europe, Asia, and Egypt.
Ancient-Warfare.com, the online home of Ancient Warfare magazine
Coin of Seleucus I Nicator. British Museum, London (Britain). Photo Marco Prins.Seleucus I Nicator (British Museum, London; ©**)
During the next quarter of a century, it was decided on the battlefield whether these states could endure. As it turned out, there were no great territorial changes, although there were dynastic changes. After incursion by Celtic tribes, the period of state-forming came to an end in c.280

An overview of all articles on Alexander's military successors on this website can be found here.

Europe
Anatolia
Near East
Iraq and Iran
323 June     11. Death of Alexander  
Late July Begin Lamian War      
Autumn Begin siege of Lamia     Veterans' revolt
322 Spring   Perdiccas in Cappadocia   Peithon defeats veterans
Sept. 5. Battle of Crannon      
Dec. First Diadoch War First Diadoch War First Diadoch War  
321 Summer?   Eumenes defeats Craterus    
320 May     Perdiccas killed in Egypt  
Summer     Intervention by Antipater  
Autumn     Triparadisus conference  
319 Spring Antigonus defeats Eumenes Ptolemy occupies Phoenicia  
Summer Death of Antipater Eumenes besieged in Nora    
318 Spring Second Diadoch War Second Diadoch War Second Diadoch War  
Summer     Eumenes in Cilicia  Revolt of Peithon 
Autumn Antigonus defeats Polyperchon   Eumenes in Phoenicia  
317 Winter     Antigonus pursues Eumenes Peithon defeated
Spring Cassander regent     Eumenes in Susa
Dec. Death of king Philip      
316 Winter Death of Olympias   Antigonus defeats Eumenes Chandragupta Maurya
occupies the Punjab
June Cassander founds Cassandria     Antigonus arrives
315 Jan.       Eumenes defeated
Spring Cassander founds Thessalonica (?)     Seleucus flees
314 Spring Third Diadoch War Third Diadoch War Third Diadoch War  
Summer     Antigonus in Phoenicia  
Autumn Antigonus declares the freedom of Greece   Ptolemy seizes Cyprus  
313 Summer Peloponnese sides with Antigonus   Fall of Tyre  
312 Summer   Ptolemy in Cilicia    
Autumn     Battle of Gaza  
311 Winter        
May     Ptolemy invades Syria  Babylonian war
Seleucus in Babylon
Summer     Ptolemy evacuates Syria
Sept.       Seleucus conquers
Media and Elam
Dec. Peace treaty Peace treaty Peace treaty  
310 Spring       Demetrius in Babylon
Sept.       Antigonus in Babylon
309 Spring     Ptolemy conquers Cyprus Antigonus leaves Babylon
Summer   Ptolemy in the Aegean    
Aug. Ptolemy in Greece     Antigonus defeated
Autumn     Antigonus in Syria  
Dec. Lysimachus founds Lysimachia      
308 Winter Ptolemy leaves Greece   Ptolemy returns  
Spring Polyperchon sides with Cassander   Antigonus founds Antigonia Seleucus' eastern war
307 Spring Fourth Diadoch War Fourth Diadoch War Fourth Diadoch War  
June 10. Liberation of Athens     Seleucus in Bactria
306 Spring     Battle of Salamis  
Summer     Antigonus becomes king  
Autumn     Failed attack on Egypt  
305 Summer Siege of Rhodes      
304 January     6. Ptolemy crowned king  
304 Summer Armistice at Rhodes     Seleucus in India
Autumn Demetrius in Greece     Peace with Chandragupta
303 Summer Greek League      
302 Summer   Lysimachus invades Asia    
Autumn Demetrius in Thessaly      
301 Winter Armistice
Foundation of Halos		   Ptolemy in Syria  
Summer   Battle of Ipsus    
Autumn   Lysimachus occupies Phrygia Ptolemy occupies Phoenicia  
300       Seleucus founds Antioch Seleucus founds Seleucia
  Marriage alliances between Lysander and Ptolemy   Marriage alliances between Lysander and Ptolemy  
299   Marriage alliance between Demetrius and Seleucus   Marriage alliance between Demetrius and Seleucus  
298   Death of Cassander Demetrius occupies Cilicia Seleucus raids Samaria  
297          
296 Spring Pyrrhus king of Epirus      
Summer Demetrius besieges Athens      
295 Summer Athens surrenders      
Autumn Civil war in Macedonia      
294 Spring Pyrrhus in Macedonia Seleucus invades Cilicia  Ptolemy occupies Cyprus   
Summer Demetrius in Macedonia      
Autumn Demetrius proclaimed king      
293     Lysimachus occupies Ionia Ptolemy occupies Lycia  
292   War between Demetrius and Pyrrhus   Antioch made capital  
291          
290   Demetrius founds Demetrias      
289   Demetrius defeats Pyrrhus      
288   Revolt against Demetrius   Ptolemy takes Sidon and Tyrus  
287 Spring  Gonatas made governor Ptolemy in Athens    
Summer Lysimachus and Pyrrhus divide Macedonia Demetrius invades Asia    
286   Pyrrhus attacks Gonatas Demetrius defeats Seleucus    
285 Winter   Demetrius surrenders
to Seleucus		 Ptolemy succeeded by Ptolemy II  
Summer Lysimachus sole ruler in Macedonia      
284          
283   Death of Demetrius    
282 January     Death of Ptolemy I  
August War betw. Seleucus and Lysimachus War betw. Seleucus and Lysimachus War betw. Seleucus and Lysimachus War betw. Seleucus and Lysimachus
281 February   Battle of Curupedion    
Sept. Seleucus murdered      
Oct. Ptolemy Keraunos king Antiochus becomes king Antiochus becomes king Antiochus becomes king
280       First Syrian War  
279 Summer Galatian war      
Winter Ptolemy Keraunos killed   Armistice  
278   Attack on Delphi Galatian invasion of Asia    
277   Gonatas defeats Galatians      
276   Gonatas king of Macedonia      
275     Antiochus defeats Galatians     
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