Augustus's foreign policy and the imperial frontiers, including expansion in Spain, the Alps, the Balkans, Germany, the Parthian settlement, the Teutoburg disaster (AD 9), and the recommendation to keep the empire within its frontiers

What this dot point is asking

NESA expects you to describe Augustus's foreign-policy campaigns (Spain, the Alps, the Balkans, Germany), the Parthian settlement of 20 BC, the Teutoburg disaster of AD 9 and its consequences, and the shift from expansion to defensive frontiers in the later reign.

The answer

Spain: Cantabrian and Asturian wars (29-19 BC)

The Iberian peninsula had been Roman since the 2nd century BC but the north-western mountain regions resisted. Augustus campaigned in person (26-25 BC) and the wars were completed under Agrippa in 19 BC. The provinces of Hispania Tarraconensis, Lusitania, and Baetica were stabilised. The temple of Janus was closed in 25 BC to mark the (premature) peace.

Alpine campaigns (16-13 BC)

Tiberius and his brother Drusus the Elder conducted the Alpine campaigns. They subjugated the Raetian, Vindelician, and other Alpine tribes, securing the routes between Italy and Gaul. The Trophy of the Alps (Tropaeum Alpium, dedicated 6 BC at La Turbie above Monaco) commemorated the victory with a tower and an inscription listing 45 conquered tribes.

Balkans and Danubian frontier

Pannonia (12-9 BC). Tiberius conquered Pannonia, pushing the frontier to the Danube.

Moesia (29 BC and following). Conquered under Crassus the Younger.

Illyricum. Tiberius and others pacified the western Balkans.

The Great Illyrian Revolt (AD 6-9). A massive rebellion in Pannonia and Dalmatia required substantial Roman resources. Tiberius led the response. Suetonius (Tiberius 16) describes the war as the heaviest fighting since the Punic wars. The revolt was suppressed by AD 9, just as the Teutoburg disaster occurred.

Germany and the Teutoburg disaster

Drusus the Elder (12-9 BC). Augustus's stepson Drusus (younger brother of Tiberius) campaigned across the Rhine to advance the frontier toward the Elbe. He reached the Elbe in 9 BC but died after a fall from his horse on the return journey.

Tiberius (later campaigns). Continued the German campaigns intermittently.

The Teutoburg disaster (September AD 9). Publius Quinctilius Varus, governor of Germania, was marching three legions (XVII, XVIII, XIX) back from summer campaigns to winter quarters when he was ambushed in the Teutoburg Forest by the Cherusci leader Arminius (a Romanised German with Roman citizenship who had served as an auxiliary commander). Over three days the Roman army was destroyed in dense forest under heavy rain. Around 15,000 to 20,000 Romans died.

The three legion numbers (XVII, XVIII, XIX) were never used again. Augustus, on receiving the news, reportedly tore his clothes and refused to cut his hair or beard for months, crying "Quintilius Varus, give me back my legions!" (Suetonius, Divus Augustus 23).

Strategic consequence. Augustus abandoned the planned Elbe frontier and pulled back to the Rhine. The German campaigns ended. Two legions were transferred from the Balkans to the Rhine, bringing the legion count to 25 (down from 28). The Rhine remained the German frontier for centuries.

The Parthian settlement (20 BC)

The Parthian Empire to the east was Rome's only peer-rival. Crassus had been defeated and killed at the Battle of Carrhae (53 BC) with 30,000 Romans lost and seven legionary eagles captured. Antony had failed in Parthia in 36 BC.

Augustus chose negotiation rather than invasion. Tiberius led an army to Armenia. The Parthian king Phraates IV, faced with internal pressures and Roman military presence, returned the legionary standards (eagles) captured from Crassus and Antony.

The recovery of the standards was a major political event. Augustus presented it as equivalent to a military victory. The Prima Porta statue (around 20 BC, now in the Vatican Museums) depicts Augustus in armour, the breastplate showing a Parthian returning a Roman standard. The Res Gestae (29) celebrates the recovery: "I forced the Parthians to restore to me the spoils and standards of three Roman armies."

Egypt and Africa

Egypt, annexed in 30 BC, was administered by an equestrian prefect under direct imperial control. The wealth of Egypt was effectively Augustus's personal resource.

In Africa (modern Tunisia/Algeria), Roman power extended into the desert margins. The legio III Augusta was stationed at Lambaesis. Gaetulian and Garamantian campaigns secured the frontier.

Augustus's testament to Tiberius

Tacitus (Annals 1.11) reports Augustus's posthumous advice to Tiberius: keep the empire within its existing frontiers. The Teutoburg disaster had taught the limits of further expansion. The frontiers Augustus established (Rhine, Danube, Euphrates, the African desert margins) remained essentially stable for over two centuries.

Augustus's foreign policy at a glance

Historiography

Adrian Goldsworthy (Augustus, 2014) treats the early reign as ambitious expansion and the later reign (after Teutoburg) as defensive consolidation.

Werner Eck (The Age of Augustus, 2003) emphasises the eventual restraint and the strategic value of the established frontiers.

Karl Galinsky (Augustan Culture, 1996) integrates the propaganda framing of foreign policy (the Prima Porta statue, the closing of the doors of Janus) with the military realities.

How to read a source on this topic

Section IV sources on foreign policy typically include extracts from the Res Gestae (chapters 25-33), Tacitus's Annals 1.11 and 2 (on Germanicus's later expeditions to recover the standards), Suetonius's Divus Augustus 21-23, or images such as the Prima Porta statue and the Tropaeum Alpium. Three reading habits.

First, watch the propaganda framing. Augustus presents the Parthian settlement (a negotiated return) as a triumph. The Res Gestae downplays Teutoburg.

Second, distinguish expansion from consolidation. The early-reign campaigns (Spain, the Alps, Germany) were expansion; the post-AD 9 strategy was consolidation.

Third, integrate the propaganda artefacts (Prima Porta, Tropaeum Alpium) with the military events. The art and the campaigns are part of the same imperial program.

Common exam traps

Treating Augustus as a great conqueror. Spain, the Alps, and the Balkans were real conquests; Parthia was a settlement; Germany ended in disaster.

Forgetting the Parthian settlement. The 20 BC recovery of the standards is the most propaganda-significant foreign-policy event.

Missing the legion numbers. XVII, XVIII, XIX were lost at Teutoburg and never reused.

Confusing Drusus and Tiberius. Drusus the Elder died in 9 BC after his German campaign. Tiberius succeeded as the major general.

In one sentence

Augustus's foreign policy combined real military conquest in Spain (completed 19 BC), the Alps (16-13 BC under Tiberius and Drusus), and the Balkans and Pannonia (to AD 9), the diplomatic recovery of the Crassus standards from Parthia (20 BC, celebrated on the Prima Porta statue and in Res Gestae 29), and a catastrophic German expansion that ended in the Teutoburg disaster (September AD 9, three legions lost under Varus to Arminius), after which Augustus pulled back to the Rhine and (according to Tacitus, Annals 1.11) advised Tiberius to keep the empire within its existing frontiers, a strategic settlement that Goldsworthy and Eck treat as the foundational moment of the long imperial peace.