Lucius Cassius Longinus was a consul

Consul

Consul was the highest elected office of the Roman Republic and an appointive office under the Empire. The title was also used in other city states and also revived in modern states, notably in the First French Republic...

 of the Roman Republic

Roman Republic

The Roman Republic was the period of the ancient Roman civilization where the government operated as a republic. It began with the overthrow of the Roman monarchy, traditionally dated around 508 BC, and its replacement by a government headed by two consuls, elected annually by the citizens and...

 in 107 BC. His colleague was Gaius Marius

Gaius Marius

Gaius Marius was a Roman general and statesman. He was elected consul an unprecedented seven times during his career. He was also noted for his dramatic reforms of Roman armies, authorizing recruitment of landless citizens, eliminating the manipular military formations, and reorganizing the...

.

As a praetor

Praetor

Praetor was a title granted by the government of Ancient Rome to men acting in one of two official capacities: the commander of an army, usually in the field, or the named commander before mustering the army; and an elected magistratus assigned varied duties...

 in 111 BC, he was sent to Numidia

Numidia

Numidia was an ancient Berber kingdom in part of present-day Eastern Algeria and Western Tunisia in North Africa. It is known today as the Chawi-land, the land of the Chawi people , the direct descendants of the historical Numidians or the Massyles The kingdom began as a sovereign state and later...

 to bring Jugurtha

Jugurtha

Jugurtha or Jugurthen was a King of Numidia, , born in Cirta .-Background:Until the reign of Jugurtha's grandfather Masinissa, the people of Numidia were semi-nomadic and indistinguishable from the other Libyans in North Africa...

 to Rome, promising him safe conduct. Jugurtha valued this pledge as much as the public pledge for his safety. In his consulship with Marius, he ventured to Gallia Narbonensis

Gallia Narbonensis

Gallia Narbonensis was a Roman province located in what is now Languedoc and Provence, in southern France. It was also known as Gallia Transalpina , which was originally a designation for that part of Gaul lying across the Alps from Italia and it contained a western region known as Septimania...

 to oppose the Cimbri

Cimbri

The Cimbri were a tribe from Northern Europe, who, together with the Teutones and the Ambrones threatened the Roman Republic in the late 2nd century BC. The Cimbri were probably Germanic, though some believe them to be of Celtic origin...

. He was killed in battle near Burdigala (modern day Bordeaux

Bordeaux

Bordeaux is a port city on the Garonne River in the Gironde department in southwestern France.The Bordeaux-Arcachon-Libourne metropolitan area, has a population of 1,010,000 and constitutes the sixth-largest urban area in France. It is the capital of the Aquitaine region, as well as the prefecture...

) against the Tigurini

Tigurini

The Tigurini were a pagus of the Celtic Helvetii. They crossed the Rhine together with the Helvetii to invade Gaul in 109 BCE...

, a pagus

Pagus

In the later Western Roman Empire, following the reorganization of Diocletian, a pagus became the smallest administrative district of a province....

of the Celtic Helvetii

Helvetii

The Helvetii were a Celtic tribe or tribal confederation occupying most of the Swiss plateau at the time of their contact with the Roman Republic in the 1st century BC...

. (According to 'Dictionary of Battles & Sieges: A-E' by Tony Jaques, page 15, Tigurini under Divicus ambushed Lucius at Aginnum, modern-day Agen on the River Garonne, where he was routed and killed.)