Decimus Junius Brutus Albinus in the context of "Lucius Junius Brutus"

Julius Caesar, the Roman dictator, was assassinated on the Ides of March (15 March), 44 BC, by a group of senators during a Senate session at the Curia of Pompey, located within the Theatre of Pompey in Rome. The conspirators, numbering between 60 and 70 individuals and led by Marcus Junius Brutus, Gaius Cassius Longinus, and Decimus Junius Brutus Albinus, stabbed Caesar approximately 23 times. They justified the act as a preemptive defense of the Roman Republic, asserting that Caesar's accumulation of lifelong political authority—including his perpetual dictatorship and other honors—threatened republican traditions.

The assassination failed to achieve its immediate objective of restoring the Republic's institutions. Instead, it precipitated Caesar's posthumous deification, triggered the Liberators' civil war (43–42 BC) between his supporters and the conspirators, and contributed to the collapse of the Republic. These events ultimately culminated in the rise of the Roman Empire under Augustus, marking the beginning of the Principate era.

The Veneti (Latin: [ˈwɛnɛtiː], Gaulish: Uenetoi) were a Gallic tribe dwelling in Armorica, in the southern part of the Brittany Peninsula, during the Iron Age and the Roman period.

A seafaring people, the Veneti strongly influenced southwestern Brittonic culture through trading relations with Great Britain. After they were defeated by Junius Brutus Albinus in a naval battle in 56 BC, their maritime commerce eventually declined under the Roman Empire, but a prosperous agricultural life is indicated by archaeological evidence.

The gens Junia or Iunia was one of the most celebrated families of ancient Rome. The gens may originally have been patrician, and was already prominent in the last days of the Roman monarchy. Lucius Junius Brutus was the nephew of Lucius Tarquinius Superbus, the seventh and last king of Rome, and on the expulsion of Tarquin in 509 BC, he became one of the first consuls of the Roman Republic.

Over the next several centuries, the Junii produced a number of very eminent men, such as Gaius Junius Bubulcus Brutus, three times consul and twice dictator during the period of the Samnite Wars, as well as Marcus and Decimus Junius Brutus, among the leaders of the conspiracy against Caesar. Although the Junii Bruti disappeared at the end of the Republic, another family, the Junii Silani, remained prominent under the early Empire.

Lucius Munatius Plancus (c. 87 BC – c. 15 BC) was a Roman senator, consul in 42 BC, and censor in 22 BC with Paullus Aemilius Lepidus. He is one of the classic historical examples of men who have managed to survive very dangerous circumstances by constantly shifting their allegiances. Beginning his career under Julius Caesar, he allied with his assassin Decimus Junius Brutus in 44 BC, then with the Second Triumvirate in 43 BC, joining Mark Antony in 40 BC, and deserting him for Octavian in 32 BC. He also founded the cities of Augusta Raurica (now Augst) and Lugdunum (now Lyon). His tomb [it] is still visible at Gaeta.

Pollentia, known today as Pollenzo (Piedmontese: Polèns), was an ancient city on the left bank of the Tanaro. It is now a frazione (parish) of Bra in the Province of Cuneo, Piedmont, northern Italy.

In antiquity Pollentia belonged to the Ligurian Statielli, Augusta Bagiennorum (modern Roncaglia in the Comune of Bene Vagienna) being 16 km to the south. Its position on the road from Augusta Taurinorum (modern Turin) to the coast at Vada Sabatia (modern Vado Ligure, near Savona), at the point of divergence of a road to Hasta (modern Asti), gave it military importance. Decimus Brutus managed to occupy it an hour before Mark Antony in 43 BC. Here Stilicho on April 6, 402, fought the Battle of Pollentia with Alaric I, which though undecided led the Goths to evacuate Italy.

The Battle of Forum Gallorum was fought on 14 April 43 BC between the forces of Mark Antony and legions loyal to the Roman Senate under the overall command of consul Gaius Pansa, aided by his fellow consul Aulus Hirtius. The untested Caesar Octavian (the future emperor Augustus) guarded the Senate's camp. The battle occurred on the Via Aemilia near a village in northern Italy, perhaps near modern-day Castelfranco Emilia.

Antony was attempting to capture the province of Cisalpine Gaul from its appointed governor, Decimus Brutus. Brutus was besieged by Antony in Mutina (modern Modena), just south of the Padus (Po) River on the Via Aemilia. The Roman Senate sent all its available forces to confront Antony and relieve Brutus. Hirtius and Octavian arrived near Mutina with five veteran legions, where they waited for Pansa, who was marching north from Rome with a further four legions of recruits. Antony had four veteran legions in addition to the troops that were besieging Mutina. Aware that he would soon be outnumbered, Antony sought to defeat his opponents in detail before they could link up. After failing to provoke a battle with Hirtius, Antony marched two of his legions between the two Senatorial armies and laid an ambush on Pansa's approaching recruits. Unknown to Antony, Pansa had already been joined by one of Hirtius' veteran legions and Octavian's praetorian cohorts.

The Battle of Mutina took place on 21 April 43 BC between the forces loyal to the Senate under consuls Gaius Vibius Pansa and Aulus Hirtius, supported by the forces of Caesar Octavian, versus the forces of Mark Antony which were besieging the troops of Decimus Brutus. The latter, one of Caesar's assassins, held the city of Mutina (present-day Modena) in Cisalpine Gaul.

Six days earlier, the Battle of Forum Gallorum had ended with heavy losses on both sides and the mortal wounding of consul Pansa. Hirtius and Octavian then launched an attack on Antony's camp, seeking to break the siege. Amid bloody fighting, Hirtius was killed, leaving the army and republic leaderless. Octavian saw action in the battle, recovered Hirtius' body, and managed to avoid defeat. Decimus Brutus also participated in the fighting with part of his forces locked up in the city. Command of Hirtius' legions then devolved to Caesar Octavian. Decimus Brutus, marginalized after the battle, soon fled Italy in the hopes of joining fellow assassins Marcus Junius Brutus and Gaius Cassius Longinus; he was, however, captured and executed en route.