Sasanian Empire, 309–379 CE
Autocracy · Empire · Middle East · Late Antiquity era
The Sasanian empire at its Shapur II peak – a Zoroastrian great power contesting Rome for Mesopotamia and Armenia.
Under the long reign of Shapur II the Sasanian empire centralized authority in the King of Kings, supported by a Zoroastrian priesthood, a landed cavalry aristocracy and the great houses. It waged sustained war with Rome for Mesopotamia and Armenia, recovering territory ceded earlier, and managed religious minorities within an official Zoroastrian order. Royal ideology fused kingship, dynasty and the sacred fire.
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Dominant patterns
- External Expansion
- Militarization
- Imperial Decline
- Authoritarian Shift
- Regime Stabilization
Political-science factor profile
Each factor 0–100; higher = stronger authoritarian / crisis pole (except institutional stability, where higher = stronger institutions).
| Centralization of Power | 75 |
| Media Control | 55 |
| Repression | 60 |
| Nationalism | 60 |
| Militarization | 85 |
| Economic Stress | 40 |
| External Conflict | 85 |
| Cult of Personality | 75 |
| Elite Fragmentation | 55 |
| Institutions | 60 |
| Social Polarization | 50 |
| Corruption & Patrimonialism | 50 |
| Ideological Mobilization | 70 |
| External Sovereignty | 100 |
Economy & society
| GDP per capita | $800 (intl-$) |
| Population | 20.0M people |
| Share of world population | 10% |
| Territory | ~3.5M km² |
| Capital population | ~400k |
Closest historical twins
The country-eras whose structural profile most resembles Sasanian Empire 309–379 CE, by similarity score (0–100).
- Urartu, 850–800 BCE – similarity 98/100 · shared: External Expansion, Militarization, Imperial Decline, Authoritarian Shift, Regime Stabilization
- Aztec Empire, 1428–1519 CE – similarity 98/100 · shared: External Expansion, Militarization, Imperial Decline, Authoritarian Shift, Regime Stabilization
- Russia, 1682–1725 CE – similarity 96/100 · shared: External Expansion, Militarization, Imperial Decline, Authoritarian Shift, Regime Stabilization
- Russia, 1762–1796 – similarity 96/100 · shared: External Expansion, Militarization, Imperial Decline, Authoritarian Shift, Regime Stabilization
- State of Qin, 361–338 BCE – similarity 95/100 · shared: External Expansion, Militarization, Imperial Decline, Authoritarian Shift, Regime Stabilization
- Byzantium, 527–565 – similarity 92/100 · shared: External Expansion, Militarization, Imperial Decline, Authoritarian Shift, Regime Stabilization
- Roman Empire, 324–361 CE – similarity 90/100 · shared: External Expansion, Militarization, Imperial Decline, Authoritarian Shift
- Macedon, 359–336 BCE – similarity 90/100 · shared: External Expansion, Militarization, Imperial Decline, Regime Stabilization
What followed
- Recovery of the eastern provinces from Rome.
- A consolidated Iranian imperial church-state.