Illyrian Wars

The Illyrian Wars were a series of wars fought between the Roman Republic and the Illyrian kingdom under the Ardiaei and Labeatae. In the First Illyrian War, which lasted from 229 BC to 228 BC, Rome's concern was that the trade across the Adriatic Sea increased after the First Punic War at a time when Ardiaei power increased under queen Teuta. Attacks on trading vessels of Rome's Italic allies by Illyrian pirates and the death of a Roman envoy named Coruncanius on Teuta's orders, prompted the Roman senate to dispatch a Roman army under the command of the consuls Lucius Postumius Albinus and Gnaeus Fulvius Centumalus. Rome expelled Illyrian garrisons from a number of Greek cities including Epidamnus, Apollonia, Corcyra, Pharos and established a protectorate over these Greek towns. The Romans also set up Demetrius of Pharos as a power in Illyria to counterbalance the power of Teuta.

The Second Illyrian War lasted from 220 BC to 219 BC. In 219 BC, the Roman Republic was at war with the Celts of Cisalpine Gaul, and the Second Punic War with Carthage was beginning. These distractions gave Demetrius the time he needed to build a new Illyrian war fleet. Leading this fleet of 90 ships, Demetrius sailed south of Lissus, violating his earlier treaty and starting the war. Demetrius' fleet first attacked Pylos, where he captured 50 ships after several attempts. From Pylos, the fleet sailed to the Cyclades, quelling any resistance that they found on the way. Demetrius foolishly sent a fleet across the Adriatic, and, with the Illyrian forces divided, the fortified city of Dimale was captured by the Roman fleet under Lucius Aemilius Paulus. From Dimale the navy went towards Pharos. The forces of Rome routed the Illyrians and Demetrius fled to Macedon, where he became a trusted councillor at the court of Philip V of Macedon, and remained there until his death at Messene in 214 BC.

In 171 BC, the Illyrian king Gentius of the Labeatae was allied with the Romans against the Macedonians. But in 169 BC he changed sides and allied himself with Perseus of Macedon. During the Third Illyrian War, in 168 BC, he arrested two Roman legati and destroyed the cities of Apollonia and Dyrrhachium, which were allied to Rome. He was defeated at Scodra by a Roman force under L. Anicius Gallus, and in 167 BC he was brought to Rome as a captive to participate in Gallus' triumph, after which he was interned at Iguvium.

In the second half of the third century BC, the Ardiaei kingdom was transformed into a formidable power under the leadership of Agron. During this time, Agron invaded part of Corcyra, Epidamnos and Pharos in succession, establishing garrisons in them. An invasion towards Epirus was repulsed. The new force disposed of 'the most powerful which could carry 50 soldiers in addition to the rowersforce, both by land and sea, of any of the kings who had reigned in Illyria before him', according to Polybius (2.2). The Illyrians used the lembus, a small and fast warship with a single bank of oars. Raids by sea from the Adriatic and Ionian were probably a familiar threat to the north-western Greeks. What was new was the use of a land army to follow up and profit from the victories gained by the navy. The Greek cities (poleis) on the coast of Illyria were systematically attacked and perhaps already conquered by Agron's forces. Rome answered an appeal from the island of Issa, threatened by Agron, by sending envoys. They never got there. They were attacked en route by Illyrian vessels, and one of them was killed, together with an Issaean ambassador.

That time a number of political events marked the adjacent Greek states. In 234 BC, the royal succession in Epirus came to an end, and a federal republic was instituted. In the south, the western part of Acarnania seceded from this arrangement. Their independence was soon threatened by the Aetolians, who began to occupy territory around the Gulf of Ambracia, including Pyrrhus' old capital, Ambracia, which forced the Epirotes to establish a new center at Phoenice. Besieged at Medion, the Acarnanians sought assistance from Demetrius II of Macedonia, who for the most of his reign had been at war with the Aetolian and Achaean Leagues. In response, the king requested assistance from Agron to relieve the siege.

The Illyrian attack under Agron was mounted in either 232 or 231 BC. One hundred lembi, with 5000 men on board, sailed up to land at Medion. They then formed up in the order that was usual in their own country, and advanced in their several companies against the Aetolian lines. The Aetolians drew up the greater part of their hoplites and cavalry in front of their own lines on the level ground and, with a portion of their cavalry and their light infantry, they hastened to occupy some rising ground in front of their camp, which nature had made easily defensible. A single charge, however, by the Illyrians, whose numbers and close order gave them irresistible weight, served to dislodge the light-armed troops, and forced the cavalry who were on the ground with them to retire to the hoplites. The Medionians joined the action by sallying out of the town and charging the Aetolians, thus, after killing a great number, and taking a still greater number prisoners, and becoming masters also of their arms and baggage, the Illyrians, having carried out the orders of Agron, conveyed their baggage and the rest of their booty to their boats and immediately set sail for their own country. This defeat of the Aetolians, who were famed for their victory over the invading Gauls a generation before, caused a sensation in Greece.

Illyrian success continued when command passed to Agron's widow Teuta, who granted individual ships a license to universal plunder. In 231 BC, the fleet and army attacked Elis and Messenia in the Peloponnese. On the way home, Teuta sent her general Scerdilaidas to capture the city of Phoenice in Epirus. The city was captured and the ensuing battle was won. A truce was agreed and Phoenice was returned for a price, along with the release of prisoners. The continued Illyrian success was another shock for the Greeks. The Epirotes signified their acceptance of the Illyrian victory by sending envoys to Teuta promising cooperation with them and hostility towards the Leagues of Greece. Phoenice was the most prosperous city in Epirus, and the centre for the growing commerce with Italy. It was Illyrian interference with that commerce that brought Roman forces across the Adriatic for the first time. Nevertheless, the Illyrians had to withdraw from Phoenice in order to deal with an internal rebellion.

Even before the war with Carthage (264–241 BC), the Romans had been aware of the danger to the Adriatic coast of Italy from seaborne attack. In 246 BC, a colony of Roman citizens was settled at Brundisium to keep a watch on the Ionian gulf. During their occupation of Phoenice, a number of Illyrian ships had engaged in privateering against Italian merchants. So many were robbed, murdered or captured that the Roman Senate, after ignoring earlier complaints, realized that something had to be done. Polybius (2.8) furnishes a suspiciously vivid account of a Roman embassy to Teuta, a version of events that was intended to justify the Roman invasion of Illyria. It was led by the brothers L. and C. Coruncanius. On arrival, they found Teuta celebrating the end of a rebellion in Illyria and engaged in laying siege to the Greek island of Issa, 'the last town which held out'. When the ambassadors complained of injuries to Romans, Teuta promised that no royal forces would harm them, but said that she was unable to put an end to the tradition of private enterprise. One of the ambassadors lost his temper; in response, the queen arranged for the insolent envoy to be murdered on his homeward voyage. News of this caused the Romans to prepare for war: legions were raised and a fleet assembled, and there was general indignation at 'the queen's violation of the law of nations'.