Mark Antony of Rome allied with Cleopatra VII of Egypt.
Mark Antony and Cleopatra move to Greece, where they are isolated by Octavian's admiral Agrippa; although they are able to win a tactical victory and break out of their isolated position at Actium, the campaign is a distaster and Octavian is able to achieve control of the east.
2 Sep 31 BCE
The Battle of Actium. Octavian defeats Mark Antony and Cleopatra VII.
1 Aug 30 BCE
After Octavian has declined to negotiate, Cleopatra reportedly commits suicide; Mark Antony stabs himself, only later finding Cleopatra still lives, and dies.
30 Aug 30 BCE
Cleopatra kills herself rather than be taken to Rome by Octavian. Her son Caesarion is later executed and her children with Antony taken to Rome.
Octavian is given extraordinary powers and the name Augustus by the Roman Senate.
Augustus is given supreme powers by the Roman Senate.