A series of civil wars and repeated invasions by Germanic tribes caused the collapse of the Western Roman Empire. Following the end of imperial authority, several Germanic tribes struggled against each other for control of territory. The Franks became the dominant power in Gaul, but Greater Frankia repeatedly broke apart during wars between rival claimants for the throne. Finally, Charlemagne united the Franks, and greatly expanded the size of the kingdom. However, his grandsons proved unwilling to share the empire, and divided it in 843, laying the foundations for France and Germany. Episode Twenty-seven explains that the enlarged Frankish kingdom was divided between Pippin's two sons when he died. Charles, the eldest son, made a marriage alliance with the Lombard king, while his younger brother Carloman tried to ally with the papacy. However, Carloman died suddenly, and Charles quickly gained control of his brother's lands. Meanwhile, Desiderius, king of the Lombards, had helped pope Stephen deal with a violent tyrant. Naturally, Stephen was grateful, but he died, and was succeeded by Hadrian, a more aggressive pope who asked for Frankish help against the Lombards.
Cast of Characters:
Charles-king of Frankia, formerly king of Neustria, Frisia and northern Austrasia (768-771), eldest son of Pippin
Carloman-king of southern Austrasia, Provence, Languedoc, Burgundy and Alemannia, younger son of Pippin (768-771)
Bertrada-mother to both Charles and Carloman
Desiderius-king of the Lombards (756-774)
Tasssilo-duke of Bavaria (748-788)
Hadrian I-Pope (772-795)
Stephen III-Pope (768-772)
Constantine II-illegitimate pope (767-768)
Christopher-head notary of the papacy
Sergius-treasurer of the church, Christopher's son
Sources:
Charlemagne-Derek Wilson
Charlemagne: Father of a Continent-Alessandro Barbero, translated by Allan Cameron
Charlemagne-Johannes Fried, Translated by Peter Lewis
Becoming Charlemagne: Europe, Baghdad, and the Empires of A.D. 800-Jeff Sypeck
King and Emperor: A New Life of Charlemagne-Janet L. Nelson
The Emperor Charlemagne-E. R. Chamberlin
The Carolingians: A Family Who Forged Europe-Pierre Riche, Translated by Michael Idomir Allen
Emperor of the West: Charlemagne and the Carolingian Empire-Hywell Williams
The Frankish Kingdoms Under the Carolingians, 751-987-Rosamond McKitterick
The Restoration of Rome: Barbarian Popes and Imperial Pretenders-Peter Heather
The Inheritance of Rome: A History of Europe from 400 to 1000-Chris Wickham
Ravenna: Capital of Empire, Crucible of Europe-Judith Herrin
The Popes: A History-John Julius Norwich
Keepers of the Keys of Heaven: A History of the Papacy-Roger Collins
The Republic of St. Peter: The Birth of the Papal State, 680-825-Thomas F. X. Noble
Image Credit
By Unknown author - [1] 'Grandes Chroniques de France, Mandragore, BNF, Public Domain, https://commons.wikimedia.org/w/index.php?curid=723625