Sixth Grade Social Studies: Division, Germanic Migrations, and the Fall of Rome
In the fourth and fifth centuries CE, the Western Roman Empire collapsed under internal socioeconomic decay, political instability, and mass Germanic migrations, while the Eastern Roman Empire endured.
The Crisis of the Third Century (235–284 CE)
Following the death of Emperor Marcus Aurelius in 180 CE and the reign of his corrupt son Commodus, the Roman Empire entered an era of military anarchy known as the Crisis of the Third Century.
The Barracks Emperors and Economic Ruin
Between 235 and 284 CE, Rome was ruled by more than twenty-six "Barracks Emperors"—military generals who seized the throne by bribing their legions, only to be assassinated by their own soldiers weeks or months later.
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| THE CRISIS OF THE THIRD CENTURY |
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| 1. POLITICAL ANARCHY: 26 emperors in 50 years; constant civil war. |
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| 2. ECONOMIC HYPERINFLATION: Emperors debased silver currency (*Denarius*) |
| down to 5% silver to pay legions; prices soared; barter replaced coins.|
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| 3. PLAGUES & DEPOPULATION: Antonine and Cyprian plagues wiped out 20% of |
| the population; severe labor shortages on farms and in military legions.|
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| 4. BORDER COLLAPSE: Germanic tribes (Franks, Goths) breach Rhine/Danube; |
| Sasanian Persian Empire captures Emperor Valerian in the East. |
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To pay mounting military bribes, emperors melted down the silver Denarius, debasing currency until coins contained less than five percent precious metal. The result was hyperinflation; merchants refused to accept imperial coins, trade collapsed, and the empire reverted to a barter economy. Plagues depopulated farmland and armies, while Germanic tribes breached the northern river frontiers.
Diocletian and the Tetrarchy (284–305 CE)
In 284 CE, a general from Illyria named Diocletian restored order by reorganizing the Roman Empire into a centralized autocratic state.
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| THE TETRARCHY (RULE OF FOUR) |
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| WESTERN ROMAN EMPIRE | EASTERN ROMAN EMPIRE |
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| - Capital: Milan / Ravenna | - Capital: Nicomedia / Byzantium |
| - Augustus: Maximian | - Senior Augustus: Diocletian |
| - Caesar (Junior): Constantius | - Caesar (Junior): Galerius |
| - Poorer, vulnerable, rural | - Wealthier, populous, commercial |
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The Division of the Empire
Diocletian recognized that the Roman Empire had grown too vast, populous, and complex to be governed by a single monarch in Rome. He divided the empire into two administrative halves: the Western Roman Empire (governing Italy, Gaul, Spain, and Britain) and the Eastern Roman Empire (governing Greece, Asia Minor, Syria, and Egypt).
Diocletian established the Tetrarchy ("Rule of Four"): each half was governed by a senior emperor, titled Augustus, assisted by a designated junior emperor and successor, titled Caesar. Diocletian selected the East for himself, establishing his capital at Nicomedia. While the division stabilized administration, it permanently split the Roman world into two halves, with the West becoming an isolated, poorer partner to the wealthy East.
Constantine and the New Capital: Constantinople (330 CE)
Following Diocletian's abdication, civil wars erupted until Constantine the Great reunited the empire in 324 CE.
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| THE STRATEGIC ADVANTAGES OF CONSTANTINOPLE |
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| Founded in 330 CE on the site of ancient Byzantium: |
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| 1. MARITIME CROSSROADS: Controlled the Bosporus Strait, connecting |
| the Black Sea to the Mediterranean Sea. |
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| 2. CONTINENTAL LAND BRIDGE: Stood at the intersection of overland |
| trade routes linking Europe and Asia. |
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| 3. NATURAL DEFENSE: Located on a triangular peninsula protected by |
| water on three sides and triple stone walls (*Theodosian Walls*) |
| on the landward side; withstood sieges for a thousand years. |
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The Founding of Constantinople
In 330 CE, Constantine made a historic geopolitical decision: he moved the imperial capital from the city of Rome eastward to the ancient Greek city of Byzantium on the Bosporus Strait, renaming it Constantinople ("City of Constantine," modern Istanbul). Constantinople occupied an unassailable strategic site: surrounded by water on three sides and protected by massive stone walls on the land side, it controlled the trade routes between Europe and Asia and between the Mediterranean and Black Seas. As imperial resources, wealth, and administrators migrated east to Constantinople, the Western Empire and the old city of Rome were left underfunded, politically neglected, and vulnerable.
The Germanic Migrations and the Huns
During the late fourth century CE, the borders of the Western Roman Empire collapsed under mass migrations of Germanic tribal confederations.
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| THE HUNNIC CATALYST AND GERMANIC SHIFT |
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| STEPPES OF CENTRAL ASIA |
| \ |
| v |
| THE HUNS (Fierce nomadic horse archers under Attila) |
| \ Slam into Eastern Europe ~370 CE; terrorize Germanic tribes |
| v |
| VISIGOTHS (Cross the Danube River fleeing Huns; defeat Rome at Adrianople)|
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| +---> VANDALS: March through Gaul/Spain; conquer North Africa |
| | (Carthage 439 CE); sack Rome by sea in 455 CE. |
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| +---> VISIGOTHS: Under Alaric, sack city of Rome in 410 CE; |
| | settle kingdom in Spain. |
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| +---> ANGLO-SAXONS: Sail across North Sea; conquer Britain. |
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| +---> FRANKS: Cross Rhine; establish kingdom in Gaul (France). |
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The Huns: Nomadic Terror
Around 370 CE, a fierce pastoral nomadic confederation from Central Asia, the Huns, swept into Eastern Europe. Mounted on swift steppe ponies, the Huns fought with composite recurve bows, shooting arrows while galloping at full speed. Led later by their ruthless king, Attila ("The Scourge of God"), the Huns destroyed Germanic tribal settlements, triggering a domino effect of displaced populations fleeing westward toward the Roman frontier.
The Battle of Adrianople (378 CE)
In 376 CE, desperate Visigoths (Western Goths) arrived at the Danube River, begging for asylum inside the Roman Empire to escape the Huns. Roman authorities granted permission, but corrupt Roman officials mistreated the refugees, forcing starving Goths to sell their children into slavery in exchange for dog meat. Enraged, the Visigoths revolted.
In 378 CE, Eastern Roman Emperor Valens led his legions against the Goths at the Battle of Adrianople in Thrace. The heavy Visigothic cavalry surprised the Roman flanks, surrounding and annihilating two-thirds of the Roman army. Emperor Valens was killed on the battlefield. Adrianople demonstrated that Roman legions were no longer invincible and shattered the northern frontier.
The Sack of Rome and the Fall of the Western Empire
Unable to recruit enough Roman citizens into the army, late Western emperors hired entire Germanic tribal contingents, known as foederati, to defend the borders. These barbarian mercenaries were led by their own chieftains, who held no loyalty to the Roman state.
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| THE FINAL FALL OF THE WESTERN EMPIRE |
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| 410 CE: THE SACK OF ROME BY ALARIC (VISIGOTHS) |
| For the first time in 800 years, a foreign invader captures Rome. |
| Visigoths plunder palaces and churches for three days; psychological |
| shock echoes across the civilized Mediterranean world. |
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| 455 CE: THE VANDAL SACK OF ROME |
| Vandals sail from Carthage, enter Rome, and plunder bronze, gold, |
| and artwork systematically for fourteen days (*vandalism*). |
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| 476 CE: THE DEPOSITION OF ROMULUS AUGUSTULUS |
| Germanic mercenary general Odoacer deposes the last teenage Western |
| Roman emperor; sends imperial robes to Constantinople. |
| The Western Roman Empire ceases to exist; Middle Ages begin. |
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The Sacks of 410 and 455 CE
In 410 CE, the Visigothic king Alaric, frustrated by broken financial promises from the Western court, besieged and sacked the city of Rome. For three days, Goths plundered the ancient capital. The news sent shockwaves across the Mediterranean; in Bethlehem, Christian scholar Saint Jerome wept: "The city which had taken the whole world was itself taken." In 455 CE, the Vandals sailed from their new kingdom in North Africa, plundering Rome systematically for two weeks.
476 CE: The End of the Western Empire
By 475 CE, the Western Roman Empire was reduced to a rump state in northern Italy ruled from the coastal marshes of Ravenna. A rebellious Roman general placed his sixteen-year-old son on the throne: ironically named Romulus Augustulus (combining the names of Rome's founder and its first emperor, with the diminutive suffix meaning "Little Augustus").
In September 476 CE, Germanic mercenary troops in Italy demanded one-third of all Italian land for their families. When the emperor's father refused, a Germanic officer named Odoacer led a mutiny, executed the father, and deposed the teenage Romulus Augustulus. Rather than appointing another puppet emperor, Odoacer packed up the royal crown, purple robe, and imperial regalia, mailing them eastward to Emperor Zeno in Constantinople with a message declaring that the West no longer required an emperor. Historians mark 476 CE as the traditional date for the Fall of the Western Roman Empire and the transition into the European Middle Ages.
The Survival of the Byzantine Empire
While the Western Roman Empire fractured into competing Germanic kingdoms (the Franks in France, the Visigoths in Spain, the Anglo-Saxons in Britain, and the Ostrogoths in Italy), the Eastern Roman Empire survived for another thousand years, known to historians as the Byzantine Empire. Governed from Constantinople with its trade wealth, defensive walls, and Greek administration, the Byzantine Empire preserved classical Roman law, Greek philosophy, and Christian theology until it fell to the Ottoman Turks in 1453 CE.
Review Exercises
Exercise 1: Describe the military, economic, and political factors that caused the Crisis of the Third Century (235–284 CE).
Exercise 2: Explain the structural administrative reforms enacted by Emperor Diocletian, detailing the division of the empire and the Tetrarchy system.
Exercise 3: Trace the sequence of Germanic migrations catalyzed by the arrival of the Huns, explaining the significance of the Battle of Adrianople (378 CE) and the deposition of Romulus Augustulus in 476 CE.
Solutions
Solution 1: The Crisis of the Third Century was caused by political instability, with 26 "Barracks Emperors" seizing power through troop bribes before being assassinated. Economically, emperors debased the silver currency, triggering hyperinflation and collapsing trade into a barter economy. Plagues decimated the workforce, while civil warfare drained treasury reserves and allowed Germanic tribes and the Sasanian Persian Empire to breach Roman river borders.
Solution 2: Diocletian recognized that the Roman Empire was too vast for one ruler to administer. He divided the empire into Western and Eastern halves and created the Tetrarchy ("Rule of Four"), where each half was governed by a senior Augustus assisted by a junior Caesar. While this stabilized tax collection and border security, it marginalized the Western Empire, leaving it economically depleted and isolated while Diocletian moved the administrative focus to the wealthier East.
Solution 3: Around 370 CE, the nomadic Huns invaded Eastern Europe, forcing Germanic tribes like the Visigoths to seek refuge across the Roman Danube frontier. Corrupt Roman mistreatment provoked a Visigoth rebellion, resulting in the Battle of Adrianople in 378 CE, where Goths slaughtered two-thirds of the Roman army and killed Emperor Valens. Western emperors became dependent on unreliable barbarian mercenaries until 476 CE, when the Germanic general Odoacer deposed the last Western emperor, Romulus Augustulus, marking the fall of the Western Roman Empire.