Battle of the Rubicon

E212505

historical event military campaign incident

The Battle of the Rubicon refers to Julius Caesar’s decisive crossing of the Rubicon River in 49 BCE, an act of insurrection that triggered the Roman civil war and symbolized the point of no return.

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All labels observed (5)

Label	Occurrences
Crossing of the Rubicon	4
Battle of the Rubicon canonical	1
Caesar's crossing of the Rubicon	1
Caesar’s crossing of the Rubicon	1
Crossing of the Rubicon by Julius Caesar	1

How this entity was disambiguated

This entity first appeared as the object of triple T1900353 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Battle of the Rubicon
Context triple: [Caesar’s civil war, hasKeyBattle, Battle of the Rubicon]

A. Battle of Vercellae
The Battle of Vercellae was a decisive 101 BC clash in northern Italy where Roman forces under Gaius Marius annihilated the Cimbri, ending the Cimbrian War and cementing Marius’s military prestige.
B. Battle of Actium
The Battle of Actium was the decisive 31 BC naval confrontation in which Octavian defeated the combined forces of Mark Antony and Cleopatra, paving the way for his sole rule and the emergence of the Roman Empire.
C. Sulla’s First Civil War
Sulla’s First Civil War was a Roman internal conflict (88–87 BCE) in which the general Lucius Cornelius Sulla marched on Rome and fought his political rivals, marking a key step in the Republic’s collapse into recurring civil wars.
D. Battle of the Milvian Bridge
The Battle of the Milvian Bridge (312 CE) was a decisive clash between Constantine and Maxentius near Rome, famous for Constantine’s reported vision that led to his adoption of the Christian symbol and helped pave the way for the Roman Empire’s Christianization.
E. Battle of Beneventum
The Battle of Beneventum was a decisive clash in 275 BC between Roman forces and the army of Pyrrhus of Epirus that effectively ended major Greek resistance in southern Italy and paved the way for Roman dominance over Magna Graecia.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Battle of the Rubicon
Target entity description: The Battle of the Rubicon refers to Julius Caesar’s decisive crossing of the Rubicon River in 49 BCE, an act of insurrection that triggered the Roman civil war and symbolized the point of no return.

A. Battle of Vercellae
The Battle of Vercellae was a decisive 101 BC clash in northern Italy where Roman forces under Gaius Marius annihilated the Cimbri, ending the Cimbrian War and cementing Marius’s military prestige.
B. Battle of Actium
The Battle of Actium was the decisive 31 BC naval confrontation in which Octavian defeated the combined forces of Mark Antony and Cleopatra, paving the way for his sole rule and the emergence of the Roman Empire.
C. Sulla’s First Civil War
Sulla’s First Civil War was a Roman internal conflict (88–87 BCE) in which the general Lucius Cornelius Sulla marched on Rome and fought his political rivals, marking a key step in the Republic’s collapse into recurring civil wars.
D. Battle of the Milvian Bridge
The Battle of the Milvian Bridge (312 CE) was a decisive clash between Constantine and Maxentius near Rome, famous for Constantine’s reported vision that led to his adoption of the Christian symbol and helped pave the way for the Roman Empire’s Christianization.
E. Battle of Beneventum
The Battle of Beneventum was a decisive clash in 275 BC between Roman forces and the army of Pyrrhus of Epirus that effectively ended major Greek resistance in southern Italy and paved the way for Roman dominance over Magna Graecia.
F. None of above. chosen

Statements (45)

Predicate	Object
instanceOf	historical event ⓘ military campaign incident ⓘ
hasAlternativeName	Crossing of the Rubicon ⓘ linked to: Battle of the Rubicon
hasAssociatedPhrase	alea iacta est ⓘ the die is cast ⓘ
hasCause	Senate order that Caesar disband his army and return to Rome as a private citizen ⓘ conflict between Julius Caesar and the Roman Senate ⓘ political rivalry between Julius Caesar and Pompey ⓘ
hasCulturalLegacy	modern idiom “to cross the Rubicon” meaning to pass a point of no return ⓘ
hasEffect	beginning of the Roman civil war of 49–45 BCE ⓘ collapse of the Roman Republic’s constitutional order ⓘ long‑term transition from Roman Republic to Roman Empire ⓘ outbreak of Caesar’s Civil War ⓘ rise of Julius Caesar as sole ruler of Rome ⓘ
hasFollowedBy	Battle of Pharsalus ⓘ linked to: Pharsalus Caesar’s march on Rome ⓘ linked to: Caesar’s civil war dictatorship of Julius Caesar ⓘ
hasHistoricalRegion	Roman Republic ⓘ
hasLegalContext	violation of Roman law forbidding a general to lead a legion across the pomerium or into Italy without Senate approval ⓘ
hasLocation	Cisalpine Gaul ⓘ Rubicon River ⓘ northern Italy ⓘ linked to: Northern Italy
hasMainParticipant	Caesar’s 13th Legion Gemina ⓘ linked to: legion XIII Gemina Gaius Julius Caesar ⓘ Pompey the Great ⓘ Roman Senate ⓘ
hasMilitaryAspect	unauthorized movement of a Roman legion into Italy ⓘ
hasOpposingSide	Optimates faction in the Roman Senate ⓘ linked to: optimates Pompey’s senatorial coalition ⓘ
hasOutcome	Caesar advances toward Rome with his army ⓘ flight of many senators and Pompey from Rome ⓘ
hasPoliticalAspect	challenge to senatorial authority ⓘ escalation of power struggle between populares and optimates ⓘ
hasPrecededBy	Caesar’s proconsulship in Gaul ⓘ end of the First Triumvirate ⓘ
hasRelatedConcept	Roman civil wars ⓘ end of the Roman Republic ⓘ
hasSymbolicMeaning	irrevocable decision ⓘ point of no return ⓘ
hasTime	49 BCE ⓘ January 49 BCE ⓘ
hasUncertainDetail	exact location of the ancient Rubicon River is debated by historians ⓘ
isDescribedIn	Commentarii de Bello Civili by Julius Caesar ⓘ linked to: Commentarii de Bello Civili Plutarch’s Life of Caesar ⓘ linked to: Life of Julius Caesar Suetonius’ The Twelve Caesars ⓘ linked to: De vita Caesarum

How these facts were elicited