* Cassius Dio, Roman History, Book 70,

The Alemanni were first mentioned by Cassius Dio describing the campaign of Caracalla in 213.

Cassius Dio ( 78. 13. 4 ) portrays the Alemanni as victims of this treacherous emperor.

The tale of Cassius Dio is also somewhat different.

Others are Suetonius and Cassius Dio.

Another mutiny forced the retirement of Cassius Dio from his command.

His advisers were men like the famous jurist Ulpian, the historian Cassius Dio and a select board of sixteen senators ; a municipal council of fourteen assisted the urban prefect in administering the affairs of the fourteen districts of Rome.

* Cassius Dio, Roman History, Book 80

Most of these data have been recorded by Plutarch, Florus, Cicero, Dio ( Dion ) Cassius and Dionysius of Halicarnassus ( L. 2 ).

The Roman historians Suetonius and Cassius Dio record that in 23 BC, Augustus prepared a rationarium ( account ) which listed public revenues, the amounts of cash in the aerarium ( treasury ), in the provincial fisci ( tax officials ), and in the hands of the publicani ( public contractors ); and that it included the names of the freedmen and slaves from whom a detailed account could be obtained.

Dio Cassius describes this surprise tactic employed by Aulus Plautius against the " barbarians "— the British Celts — at the battle of the River Medway, 43:

( Cassius Dio, Roman History, Book 60: 20 )

In the 3rd century, however, the Greek historian Dio Cassius states that the " Bastarnae are properly classed as Scythians " and " members of the Scythian race ".

* Dio Cassius Roman History ( ca.

Boudica then either killed herself, so she would not be captured, or fell ill and died — the extant sources, Tacitus and Cassius Dio, differ.

Her name was clearly spelled Boudicca in the best manuscripts of Tacitus, but also Βουδουικα, Βουνδουικα, and Βοδουικα in the ( later and probably secondary ) epitome of Cassius Dio.

Cassius Dio says that Roman financiers, including Seneca the Younger, chose this time to call in their loans.

* Cassius Dio, Roman History, Book 50

According to Cassius Dio Claudius became very sickly and thin by the end of Caligula's reign, most likely due to stress.

The main ancient historians Tacitus, Suetonius, and Cassius Dio all wrote after the last of the Flavians had gone.

Cassius Dio said that this act " though delighting the rabble, grieved the sensible, who stopped to reflect, that if the offices should fall once more into the hands of the many ... many disasters would result ".

According to Cassius Dio, a financial crisis emerged in AD 39.

Cassius Dio had written an entire chapter on the annexation of Mauretania by Caligula, but it is now lost.

According to Cassius Dio, living Emperors could be worshipped as divine in the east and dead Emperors could be worshipped as divine in Rome.

While repeating the earlier stories, the later sources of Suetonius and Cassius Dio provide additional tales of insanity.

The same year, they defeated another Roman army under the consul Gaius Cassius Longinus, who was killed at the Battle of Burdigala ( modern day Bordeaux ).

* Cassius Dio, Roman History, Book 59

Cassius Dio claimed to represent the voices of the Roman street ; Caesar's munus was a waste of lives – and of money, better doled out to needy army veterans.

Upon the death of Deiotarus, the Kingdom of Galatia was given to Amyntas, an auxiliary commander in the Roman army of Brutus and Cassius who gained the favor of Mark Antony.

The tribes began a joint invasion of Gaul, including the Roman Provincia Narbonensis, which led to the Tigurini ’ s victory over a Roman army under L. Cassius Longinus near Agendicum in 107 BC, in which the consul was killed.

* 44 BC – Julius Caesar, Dictator of the Roman Republic, is stabbed to death by Marcus Junius Brutus, Gaius Cassius Longinus, Decimus Junius Brutus and several other Roman senators on the Ides of March.

The Parthian Empire had supported Brutus and Cassius in the civil war, sending forces which fought with them at Philippi ; following Antony and Octavian's victory, the Parthians invaded Roman territory, occupying Syria, advancing into Asia Minor and installing Antigonus as puppet king in Judaea to replace the pro-Roman Hyrcanus.

* Dio Cassius, Roman History 40: 33-41, 43: 19

Sextus Pompey becomes supreme commander of the Roman navy and Gaius Cassius proconsul of Syria.

* Avidius Cassius, Roman general and usurper ( d. 175 )

* Dio Cassius, Roman historian

* March 15 ( the Ides of March ) – Julius Caesar, dictator of Rome, is assassinated by a group of Roman senators, amongst them Gaius Cassius Longinus, Marcus Junius Brutus, and Caesar's Massilian naval commander, Decimus Brutus.

* A Roman military operation under Avidius Cassius is successful against Parthia, capturing Artaxata, Seleucia on the Tigris, and Ctesiphon.

* Avidius Cassius fails in seeking support for his rebellion and is assassinated by Roman officers.

* July – Avidius Cassius, Roman Emperor ( usurper )

* Gaius Cassius Longinus, Roman politician ( died 42 BC )