On This Day

45 BC The Julian calendar takes effect for the first time by edict of Roman dictator Julius Caesar

Gaius Julius Caesar (12 or 13 July 100 BC – 15 March 44 BC) was a Roman general and statesman who was the dictator of the Roman Republic at various points from 49 BC until his assassination in 44 BC.

Gaius Julius Caesar (12 or 13 July 100 BC – 15 March 44 BC) was a Roman general and statesman who was the dictator of the Roman Republic at various points from 49 BC until his assassination in 44 BC. A member of the First Triumvirate, he led the Roman armies through the Gallic Wars and defeated his political rival Pompey in Caesar’s civil war. He consolidated power and proclaimed himself dictator perpetuo (dictator for life) in 44 BC, which contributed to the political conditions that led to the collapse of the Roman Republic and the emergence of the Roman Empire.

Historical Significance

Gaius Julius Caesar (12 or 13 July 100 BC – 15 March 44 BC) was a Roman general and statesman who was the dictator of the Roman Republic at various points from 49 BC until his assassination in 44 BC.

Key People

Julius Caesar

Roman general and dictator

Roman general and dictator

Events Before

  1. 42 BC Second Battle of Philippi: Brutus's army is decisively defeated by Mark Antony and Octavian during the Roman Repub

    42 BC Second Battle of Philippi: Brutus's army is decisively defeated by Mark Antony and Octavian during the Roman Republican civil wars causing Brutus to fall on his sword

  2. 43 BC Octavian, later known as Augustus, compels the Roman Senate to elect him consul

    43 BC Octavian, later known as Augustus, compels the Roman Senate to elect him consul

  3. 43 BC Second Triumvirate alliance of Roman leaders formed by Octavian (later Caesar Augustus), Marcus Aemilius Lepidus,

    43 BC Second Triumvirate alliance of Roman leaders formed by Octavian (later Caesar Augustus), Marcus Aemilius Lepidus, and Mark Antony

  4. 43 BC Roman orator and politician Marcus Tullius Cicero is assassinated in Formiae by soldiers under the command of Mark

    43 BC Roman orator and politician Marcus Tullius Cicero is assassinated in Formiae by soldiers under the command of Mark Antony

  5. 44 BC Julius Caesar is stabbed to death by Brutus, Cassius and several other Roman senators on the Ides of March in Rome

    The Ides of March (Latin: Idus Martiae, Medieval Latin: Idus Martii) is the day on the Roman calendar marked as the Idus, roughly the midpoint of a month, of Martius, corresponding to 15 March on the...

Events After

  1. 46 BC Battle of Thapsus: Julius Caesar defeats Caecilius Metellus Scipio and Marcus Porcius Cato (Cato the Younger) near

    46 BC Battle of Thapsus: Julius Caesar defeats Caecilius Metellus Scipio and Marcus Porcius Cato (Cato the Younger) near Thapsus in modern-day Tunisia

  2. 48 BC Caesar's Civil War: Julius Caesar decisively defeats Pompey the Great at the Battle of Pharsalus, forcing Pompey t

    48 BC Caesar's Civil War: Julius Caesar decisively defeats Pompey the Great at the Battle of Pharsalus, forcing Pompey to flee to Egypt

  3. 49 Roman Emperor Claudius marries his fourth wife and niece Agrippina the Younger

    Julia Agrippina (6 November AD 15 – 23 March AD 59), also referred to as Agrippina the Younger, was Roman empress from AD 49 to 54, the fourth wife and niece of emperor Claudius, and the mother of…

  4. 49 BC Julius Caesar defies the Roman Senate and crosses the Rubicon, uttering "alea iacta est" (the die is cast), signal

    49 BC Julius Caesar defies the Roman Senate and crosses the Rubicon, uttering "alea iacta est" (the die is cast), signaling the start of civil war and his appointment as Roman dictator for life

  5. 49 BC Julius Caesar's general Gaius Scribonius Curio is defeated in the Second Battle of the Bagradas River by the Numid

    49 BC Julius Caesar's general Gaius Scribonius Curio is defeated in the Second Battle of the Bagradas River by the Numidians under Publius Attius Varus and King Juba I of Numidia. Curio commits suicide to avoid capture

More from the 40s

Frequently Asked Questions

What happened on January 1, 45?
Gaius Julius Caesar (12 or 13 July 100 BC – 15 March 44 BC) was a Roman general and statesman who was the dictator of the Roman Republic at various points from 49 BC until his assassination in 44 BC. A member of the First Triumvirate, he led the Roman armies through the Gallic Wars and defeated his political rival Pompey in Caesar’s civil war. He consolidated power and proclaimed himself dictator perpetuo (dictator for life) in 44 BC, which contributed to the political conditions that led to the collapse of the Roman Republic and the emergence of the Roman Empire.
Why is 45 BC The Julian calendar takes effect for the first time by edict of Roman d... significant?
Gaius Julius Caesar (12 or 13 July 100 BC – 15 March 44 BC) was a Roman general and statesman who was the dictator of the Roman Republic at various points from 49 BC until his assassination in 44 BC.
Who was involved in 45 BC The Julian calendar takes effect for the first time by edict of Roman d...?
Key figures include Julius Caesar (Roman general and dictator).

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