Concolitanus was one of the two leaders of the Gaesatae

Gaesatae

The Gaesatae were a group of Gaulish warriors who lived in the Alps near the river Rhône and fought against the Roman Republic in the Battle of Telamon of 225 BC...

, a group of Gaul

Gaul

Gaul was a region of Western Europe during the Iron Age and Roman era, encompassing present day France, Luxembourg and Belgium, most of Switzerland, the western part of Northern Italy, as well as the parts of the Netherlands and Germany on the left bank of the Rhine. The Gauls were the speakers of...

ish mercenaries who lived in the Alps

Alps

The Alps is one of the great mountain range systems of Europe, stretching from Austria and Slovenia in the east through Italy, Switzerland, Liechtenstein and Germany to France in the west....

 near the Rhône

Rhône River

The Rhone is one of the major rivers of Europe, rising in Switzerland and running from there through southeastern France. At Arles, near its mouth on the Mediterranean Sea, the river divides into two branches, known as the Great Rhone and the Little Rhone...

 and fought against 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 the Battle of Telamon

Battle of Telamon

The Battle of Telamon was fought between the Roman Republic and an alliance of Gauls in 225 BC. The Romans, led by the consuls Gaius Atilius Regulus and Lucius Aemilius Papus, defeated the Gauls, thus extending their influence over northern Italy....

 of 224 BC. He and his colleague Aneroëstes

Aneroëstes

Aneroëstes was one of the two leaders of the Gaesatae, a group of Gaulish mercenaries who lived in the Alps near the Rhône and fought against the Roman Republic in the Battle of Telamon of 224 BC. He and his colleague Concolitanus were hired by the Boii and Insubres in response to the Roman...

 were hired by the Boii

Boii

The Boii were one of the most prominent ancient Celtic tribes of the later Iron Age, attested at various times in Cisalpine Gaul , Pannonia , in and around Bohemia, and Transalpine Gaul...

 and Insubres

Insubres

The Insubres were a Gaulish population settled in Insubria, in what is now Lombardy . They were the founders of Milan . Though ethnically Celtic at the time of Roman conquest , they were most likely the result of the fusion of pre-existing Ligurian, Celtic and "Italic" population strata with Gaulish...

 in response to the Roman colonisation of the formerly Gallic region of Picenum

Picenum

Picenum was a region of ancient Italy. The name is an exonym assigned by the Romans, who conquered and incorporated it into the Roman Republic. Picenum was the birthplace of such notables as Pompey the Great and his father Pompeius Strabo. It was situated in what is now Marche...

. He was captured after the defeat at Telamon (modern Talamone

Talamone

Talamone is a town in Tuscany, central Italy, administratively a frazione of the comune of Orbetello, province of Grosseto, in the Tuscan Maremma....

, Tuscany

Tuscany

Tuscany is a region in Italy. It has an area of about 23,000 square kilometres and a population of about 3.75 million inhabitants. The regional capital is Florence ....

). Aneroëstes escaped with a small group of followers and committed suicide.