Augustus and the principate, including the political reforms, the administration of the provinces, the relationship with the senate and the equestrians, the army reforms, and the consilium principis

What this dot point is asking

NESA expects you to describe Augustus's reforms of Roman government and administration: the relationship with the senate and equestrians, the imperial and senatorial provinces, the standing army, the Praetorian Guard, the aerarium militare, the consilium principis, and the wider institutional shape of the principate.

The answer

The senate

Augustus retained the senate as the central institution of Roman political life, but transformed its membership and function.

Membership purges. Augustus conducted several reviews of the senate (29, 18, and 11 BC). The senate was reduced from around 1,000 to 600 members. Property qualifications were tightened (1 million sestertii). Members of doubtful loyalty or character were removed.

Function. The senate retained its formal advisory role, debating imperial proposals and electing magistrates (now in form rather than substance). New offices created by Augustus (curators of various public works) gave senators continued employment. Provincial governorships (the senatorial provinces) continued to be allocated by lot from former consuls and praetors.

The relationship with Augustus. Augustus presented himself as primus inter pares ("first among equals"), the leading senator. He attended sessions, debated, and accepted senatorial advice. In substance, his maius imperium and tribunician power allowed him to control any senatorial decision; in form, senatorial dignity was preserved.

The equestrians

The equestrian order (eques) gained importance under Augustus. Equestrians could not hold the senatorial cursus honorum but served in administrative roles.

Property qualification. 400,000 sestertii.

Imperial administration. Equestrian prefects governed Egypt (the most important post, restricted to equestrians and forbidden to senators), commanded the Praetorian Guard, supervised the grain supply (praefectus annonae), and ran the imperial fiscus.

Military service. Equestrians served as auxiliary commanders and as junior officers (tribuni angusticlavii) in the legions.

The equestrian career path provided Augustus with a parallel administrative cadre loyal to him personally rather than to the senatorial tradition.

Imperial and senatorial provinces

Under the First Settlement, the empire was divided into:

Imperial provinces (Augustus's provincia). Governed by legates of Augustus (legati Augusti pro praetore). These contained the major legionary garrisons: Spain, Gaul, Syria, Egypt (governed by an equestrian prefect, not a senatorial legate), and other frontier provinces. Augustus controlled around 20 of 28 legions.

Senatorial provinces. Governed by proconsuls allocated by the senate, normally former consuls (Africa, Asia, Macedonia, Bithynia, etc.). These were unarmed or lightly garrisoned interior provinces.

The two-tier system institutionalised Augustus's military monopoly while preserving senatorial prestige.

The standing army

Augustus's most enduring institutional achievement was the creation of a standing professional army.

The legions. Reduced from around 60 (at the end of the civil wars) to 28, then to 25 after the Teutoburg disaster (AD 9). Stationed in the imperial provinces, with the major concentrations on the Rhine and the Danube frontiers.

Length of service. Standardised at 20 years (with possible extension to 25). Citizenship was a precondition for legionary service.

The aerarium militare (AD 6). A new state treasury for military pay and discharge benefits. Funded initially by Augustus's personal contribution of 170 million sestertii, then by a 5 per cent inheritance tax (vicesima hereditatium) and a 1 per cent sales tax (centesima rerum venalium). The aerarium militare paid for veteran settlement, removing the political problem of generals having to find land for their veterans.

Auxiliary troops. Non-citizen troops supplementing the legions, recruited from across the empire. Service was 25 years; on discharge, auxiliaries received Roman citizenship for themselves and their descendants. The system extended citizenship throughout the empire.

The Praetorian Guard. Nine cohorts of around 500 men each. Originally distributed across Italian towns; concentrated in Rome at the Castra Praetoria under Tiberius (AD 23). The Praetorians provided imperial security and a permanent Italian garrison.

The Urban Cohorts. Three cohorts (later expanded) policing Rome under the praefectus urbi.

The vigiles. Seven cohorts of firefighters and night police, established AD 6.

The consilium principis

Augustus institutionalised an advisory council. In 27 BC he selected a rotating group of consuls and proconsuls to act as advisers, sitting in conference before formal senate sessions. The body became known as the consilium principis.

In AD 13, the body was formalised and given executive authority: it could issue decrees on Augustus's behalf. This was the embryo of the imperial cabinet system.

Other administrative innovations

Cura annonae (22 BC). Augustus took responsibility for the grain supply of Rome. The praefectus annonae (an equestrian post) managed the imports. The dole (frumentationes) continued, supplying around 200,000 citizens.

Curatores aquarum, viarum, operum publicorum. New offices for the supervision of aqueducts, roads, and public buildings, providing employment for senators within the imperial system.

The imperial fiscus. The personal treasury of the emperor, separate from the public treasury (aerarium Saturni). Revenues from imperial provinces flowed to the fiscus.

Egypt as private domain. Egypt was governed by the praefectus Aegypti, an equestrian appointed personally by the emperor. Senators were forbidden to enter Egypt without imperial permission. The wealth of Egypt was effectively Augustus's personal resource.

Augustan administration at a glance

Historiography

Ronald Syme (The Roman Revolution, 1939; Tacitus, 1958) treats the principate as a disguised monarchy enabled by the army.

Werner Eck (The Age of Augustus, 2003) emphasises the novelty of the institutional arrangements.

Adrian Goldsworthy (Augustus, 2014; The Complete Roman Army, 2003) is the standard study of the military reforms.

Karl Galinsky (Augustan Culture, 1996) integrates the institutional and cultural dimensions.

How to read a source on this topic

Section IV sources on Augustan administration typically include extracts from the Res Gestae, Tacitus, Suetonius, Cassius Dio, or modern reconstructions of the legionary deployment. Three reading habits.

First, distinguish institutional form from political reality. Augustus retained Republican forms (senate, magistrates) while concentrating power. Use both registers.

Second, watch the legion numbers. 60 in 30 BC, 28 by Actium plus the early settlement, 25 after Teutoburg (AD 9). The numbers reflect strategy.

Third, weigh equestrian importance. The new administrative cadre is one of Augustus's most enduring innovations and is routinely tested.

Common exam traps

Forgetting the aerarium militare. AD 6, the most important single financial innovation.

Missing the Teutoburg disaster. AD 9 ended German expansion and reduced legions from 28 to 25.

Treating the senate as politically equal. Augustus controlled it through tribunicia potestas, maius imperium, and the legions. The form was Republican; the substance was monarchical.

Confusing the Praetorian Guard with the legions. The Guard was Italian, served the emperor personally, and was a distinct institution.

In one sentence

Augustus organised the principate through a reformed senate (purged to 600 members and given administrative employment), a new equestrian administrative cadre, the two-tier imperial and senatorial provincial system, a standing professional army of 28 (then 25) legions funded by the aerarium militare from AD 6, the Praetorian Guard, and the consilium principis, an institutional achievement that Syme reads as a disguised monarchy supported by army loyalty and Goldsworthy treats as Augustus's most enduring legacy.