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Roman Emperor, Senate and Army: Class 11 History

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HistoryCBSE Class 11 · An Empire Across Three Continents

The Emperor, the Senate, the Army and the Governing of the Roman Empire (Class 11 History, Theme 2)

Updated 17 October 2026 · Fact-checked

The early Roman Empire rested on three players: the emperor (Augustus set up the Principate in 27 BCE), the Senate of landed aristocrats and a paid professional army of at least 25 years' service. Provinces were governed through cities and local upper classes. The third century brought Sasanian and Germanic pressure and 25 emperors in 47 years.

Notice that the emperor relied on both the Senate and the paid army, but the Senate and army distrusted each other, so civil war was always a risk.

Illustration drawn for QuestionBuddy.

Understand Emperor, Senate, Army and the Governing of the Roman Empire

Why this topic matters. Questions ask you to compare the three players, explain how an empire of about 60 million was ruled, and give causes of the third-century crisis.

1. Early and late empire. Historians divide the empire into an early phase (to the main part of the third century) and a late phase. Unlike Iran, whose Parthian and Sasanian rulers governed a mainly Iranian population, Rome was a mosaic of territories and cultures held together by one government. Latin was the language of administration in the west and Greek in the east.

2. The emperor. Augustus, the first emperor, set up the Principate in 27 BCE. He held real authority but kept up the fiction that he was only the "leading citizen" (Princeps), out of respect for the Senate. Succession followed family descent, natural or adoptive (Augustus adopted Tiberius, who ruled 14-37 CE).

3. The Senate. It had controlled Rome in the Republic (509-27 BCE) and represented the aristocracy: wealthy, mainly landowning families. Most surviving histories were written by people of senatorial background, so emperors were judged by how they treated the Senate.

4. The army. Rome had a paid professional army with a minimum of 25 years of service, unlike Persia's conscripted army. It grew to about 600,000 by the fourth century and could decide the fate of emperors. The Senate feared and disliked it. Divided armies meant civil war; apart from 69 CE (four emperors in quick succession) the first two centuries were largely free of it.

5. Expansion and peace. External war was rare. The one major forward campaign was Trajan's across the Euphrates (113-17 CE), abandoned by his successors. Absorbing client kingdoms into provinces was more typical than conquest; Herod's kingdom, for example, yielded about 5.4 million denarii a year.

6. Governing through cities. Except Italy, all territories were provinces that paid tax. At its peak in the second century the empire stretched from Scotland to Armenia and from the Sahara to the Euphrates, with about 60 million people. The state ruled through great Mediterranean cities (Carthage, Alexandria and Antioch were the largest). Local upper classes collaborated to administer and tax the countryside. A Roman city had magistrates, a council and a territory of villages; promotion or demotion of a place showed imperial favour or disfavour.

7. Power shifts to the provinces. In the second and third centuries provincial upper classes supplied most governors and commanders. Gallienus (253-68) barred senators from military command. By the third century senators of provincial origin were a majority.

8. The third-century crisis. From the 230s Rome fought on several fronts. The Sasanians appeared in 225; in a three-language rock inscription Shapur I claimed to have destroyed a Roman army of 60,000 and captured Antioch. Alamanni, Franks and Goths pressed on the Rhine and Danube frontiers, and from 233 to 280 provinces were invaded repeatedly. There were 25 emperors in 47 years, and heavier taxes for military costs sharpened tension between Senate and army.

Emperor, Senate, Army and the Governing of the Roman Empire: key facts

Three players
Emperorreal authority, "leading citizen" fiction
Senatelanded aristocracy, ruled the Republic 509-27 BCE
Armypaid, minimum 25 years, about 600,000 by the fourth century
Compare their roles.
Key dates
27 BCEPrincipate
14-37 CETiberius
113-17 CETrajan across the Euphrates
225Sasanians
253-68Gallienus
As in NCERT.
Government by cities
  • Provinces except Italy paid tax
  • Cities were the bedrock
  • Local upper classes collaborated
  • About 60 million people in the second century
How a thin state ruled a huge empire.
Third-century strain
  • Sasanian dynasty from 225
  • Shapur I claims 60,000 Romans defeated
  • Alamanni, Franks, Goths on frontiers
  • 25 emperors in 47 years
Causes and symptoms.

How to answer Emperor, Senate, Army and the Governing of the Roman Empire questions

Governance answers earn marks for naming the player and a function or evidence.

  1. 1Name the three players and one distinctive fact each.
  2. 2Link the army to civil war and succession.
  3. 3Explain rule through cities and local elites.
  4. 4Add the provincial shift and Gallienus.
  5. 5For the crisis, list external causes then political symptoms.

Emperor, Senate, Army and the Governing of the Roman Empire in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Government through local partners

Suppose a state wants to collect a tax in a hundred distant villages but has only a handful of officers.

How would a Roman-style system solve this, and what does the local partner gain?

Try it first, then show the solutionSolution
  1. Use the cities and their upper classes as agents.
  2. Local elites collect and keep favour of the state, gaining status.

Answer: The state would work through local councils and upper classes, as Rome did through cities; local elites gain status and favour.

Memory hook: Rule through partners.

Paid versus conscripted

Suppose one country calls up farmers for a short period while another keeps full-time salaried soldiers for 25 years.

Which resembles Rome and what risk does it bring?

Try it first, then show the solutionSolution
  1. Rome had a paid professional army with a minimum of 25 years.
  2. A paid army can agitate for pay and decide who rules.

Answer: The second resembles Rome; the risk is that the army becomes a political force and may mutiny for pay.

Memory hook: Salary, service, power.

Tricks to remember Emperor, Senate, Army and the Governing of the Roman Empire

Short memory aids. Say each one aloud once, then use it on a question the same day.

  • E-S-A

    Emperor, Senate, Army

    Use it when: The three players.

  • 27-25-225

    27 BCE Principate, 25 years service, 225 Sasanians

    Use it when: Numbers.

  • 25 in 47

    Twenty-five emperors in forty-seven years

    Use it when: Instability.

Emperor, Senate, Army and the Governing of the Roman Empire: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Who was the Princeps? · 1 mark · MCQBoard level

Augustus is described as Princeps in order to:
(A) show that he was a military commander
(B) keep up the fiction that he was only the leading citizen out of respect for the Senate
(C) abolish the Senate
(D) divide the empire in two

Try it first, then show the solutionSolution
  1. The Principate of 27 BCE kept the outward respect for the Senate (1 mark).

Answer: (B)

Example 2: Rome and Iran · 2 marks · Very short answerBoard level

State one difference between the population of the Roman Empire and that of Iran, as NCERT describes them. (2 marks)

Try it first, then show the solutionSolution
  1. Iran's Parthian and Sasanian rulers governed a mainly Iranian population (1 mark).
  2. Rome was a mosaic of territories and cultures held together by a common government (1 mark).

Answer: Iran's population was largely Iranian, while Rome ruled many different peoples and cultures under one government.

Example 3: Army and politics · 3 marks · Short answerHarder board level

Explain why the army was both the strength and a threat to the early empire. (3 marks)

Try it first, then show the solutionSolution
  1. It was a paid professional army with at least 25 years of service, unlike conscripts elsewhere (1 mark).
  2. It was the largest organised body and could decide the fate of emperors (1 mark).
  3. Divided armies led to civil war, and soldiers could mutiny for pay, so the Senate feared it (1 mark).

Answer: Rome's paid professional army, serving at least 25 years, made the empire militarily strong. But it was the largest organised body in the state and could decide the fate of emperors. Divided armies produced civil war, as in 69 CE, and soldiers sometimes mutinied for higher pay, so the Senate feared it.

Example 4: Source-based: Gallienus · 3 marks · Source-basedHarder board level

Read: In the second and third centuries provincial upper classes supplied most governors and army commanders. Gallienus, who ruled from 253 to 268, barred senators from military command. By the third century senators of provincial origin were a majority. This reflected the decline of Italy and the rise of wealthier regions.
(i) Who barred senators from military command? (1)
(ii) What was the origin of most senators by the third century? (1)
(iii) Give one reason for the shift. (1)

Try it first, then show the solutionSolution
  1. (i) Gallienus (1 mark).
  2. (ii) Provincial (1 mark).
  3. (iii) Italy's decline and the rise of wealthier regions such as southern Spain, Africa and the east (1 mark).

Answer: (i) Gallienus; (ii) provincial origin; (iii) Italy declined while wealthier provinces rose.

Example 5: HOTS: why a huge empire stayed together · 5 marks · Long answerHOTS / competency

"The Roman Empire survived for centuries because of its army alone." Evaluate this statement. (5 marks)

Try it first, then show the solutionSolution
  1. The army was important: paid, professional, 600,000 by the fourth century (1 mark).
  2. But it also caused civil war and instability (1 mark).
  3. Rule through cities and local upper classes who collected taxes (1 mark).
  4. Provincial elites got a stake: governors, commanders and senators (1 mark).
  5. Conclusion: the army alone is not sufficient; the combination of cities, elites and common government mattered (1 mark).

Answer: The army mattered because it was paid, professional and large, and it defended the frontiers. But it also decided fates of emperors and caused civil war when divided. Another pillar was governance through cities, where local upper classes collaborated in administration and tax collection. Provincial elites were rewarded with posts as governors and commanders and later formed a majority of senators. So the empire was held by the army, city-based administration and a common government together, not by the army alone.

Where students lose marks in Emperor, Senate, Army and the Governing of the Roman Empire

The slips examiners see most often, and what to write instead.

  • Mistake: Mixing the army type

    Persia and Rome are compared.

    Wrong working

    Rome had a conscript army.

    Right working

    Rome had a paid professional army; Persia conscripted.

    Do this: Write paid and professional.

    Usually costs: 1 mark.

  • Mistake: Giving Augustus as emperor from 509 BCE

    Date confusion with the Republic.

    Wrong working

    Augustus ruled from 509 BCE.

    Right working

    The Republic was 509-27 BCE; Augustus began the Principate in 27 BCE.

    Do this: Fix both dates.

    Usually costs: 1 mark.

  • Mistake: One-sided crisis answer

    Students blame only Germanic tribes.

    Wrong working

    Barbarians caused the crisis.

    Right working

    Sasanians in the east, Germanic confederacies on the Rhine and Danube, heavy taxes and unstable succession.

    Do this: Two fronts and an internal cause.

    Usually costs: 1 mark.

Exam tips

  • Give the date or number next to each fact: 27 BCE, 25 years, 600,000, 60 million.
  • Use "provincial elites" when explaining the shift from Italy.
  • Avoid the word barbarian; write Germanic tribes or confederacies.

Practice questions on Emperor, Senate, Army and the Governing of the Roman Empire

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

  1. Q1 · 1 mark · MCQBoard level

    The Principate was established in:
    (A) 509 BCE
    (B) 27 BCE
    (C) 14 CE
    (D) 113 CE

    Hint

    Link Augustus with the date.

    Answer

    (B) 27 BCE.

  2. Q2 · 2 marks · Very short answerBoard level

    The Roman Republic lasted from 509 BCE to 27 BCE. For how many years did it last? And how long was the minimum service in the army compared with this, as a fraction? (2 marks)

    Hint

    Subtract, then divide 25 by the result.

    Answer

    509 - 27 = 482 years. The 25-year service is 25/482, about one-nineteenth, of that period (about 5 per cent).

  3. Q3 · 3 marks · Short answerHarder board level

    Why did the third century show strain within the empire? Give three causes. (3 marks)

    Hint

    Sasanians, Germanic tribes, taxes.

    Answer

    (i) The Sasanians, who appeared in 225, expanded aggressively towards the Euphrates; (ii) Germanic groups such as the Alamanni, Franks and Goths repeatedly invaded Rhine and Danube frontier provinces; (iii) the military burden raised taxes and tension between Senate and army, with 25 emperors in 47 years.

  4. Q4 · 3 marks · Short answerHarder board level

    Cities were important to Roman rule. Explain two ways in which a city served the state. (3 marks)

    Hint

    Tax and local administration.

    Answer

    Cities were the bedrock through which the government taxed the countryside, and local upper classes in cities collaborated with Rome to administer regions and raise taxes. A Roman city also governed its own territory of villages through magistrates and a council.

  5. Q5 · 4 marks · Short answerHOTS / competency

    A student writes: "The Senate disappeared when Augustus became emperor." Examine this statement using NCERT. (4 marks)

    Hint

    Fiction, Senate histories.

    Answer

    The Senate did not disappear. Augustus kept up the fiction that he was only the leading citizen in deference to it, and the Senate remained a body of wealthy landed families. Emperors were judged by how they treated the Senate, as most histories were written by senatorial authors. Its real power, however, declined, and senators were barred from military command by Gallienus; by the third century many senators were of provincial origin.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

  1. 1.Who set up the Principate?Show answer

    Augustus, in 27 BCE.

  2. 2.Which dynasty emerged in Iran in 225?Show answer

    The Sasanians.

  3. 3.Which emperor barred senators from military command?Show answer

    Gallienus.

  4. 4.Approximately how many people did the empire have in the second century?Show answer

    About 60 million.

Emperor, Senate, Army and the Governing of the Roman Empire: frequently asked questions

Was Augustus a king?

He held real authority but presented himself as the leading citizen, Princeps.

Why is 69 CE mentioned?

It had four emperors in quick succession, the exception in two centuries largely free of civil war.

Who was Shapur I?

A Sasanian ruler whose rock inscription claims victory over a Roman army and capture of Antioch.