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Under the Viking Yoke: A History of Early Medieval Brittany, a historical companion book to the Saga of Hasting the Avenger by C.J. Adrien

Under the Viking Yoke: A History of Early Medieval Brittany

“Adrien satisfies with an easy-to-read deep dive into the region in which many of the adventures of the Viking Hasting take place.” – Reader Review

In Under the Viking Yoke, author and historian C.J. Adrien peels back the layers of legend to reveal the gritty, objective reality of early medieval Brittany—a land of “irreducible” frontiers, fractured chiefdoms, and a “Small Britain” that nearly became a great European power. From the Roman “First Atlantic Wall” to the rise of the legendary Nominoë, Adrien traces the evolution of a nation caught between the Carolingian Empire and the Viking diaspora in a deep dive into how Breton identity was forged in the fires of occupation and rebellion. Written with a narrative style that blends the wit of Bill Bryson with the historical rigor of the world’s leading medievalists, Under the Viking Yoke serves as the definitive companion to the Saga of Hasting the Avenger. Discover the true history of the “Little Britain” that was salvaged from the ashes of Viking conquest—a story that is often weirder, messier, and more cinematic than fiction itself.

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The History of The Saga of Hasting the Avenger

Under the Viking Yoke: A History of Early Medieval Brittany is grounded in the documented volatility of ninth-century Europe, where the waning authority of the Carolingian Empire struggled to secure its frontiers against the rising tide of a Breton independence movement, coinciding with the Norse expansion. The narrative explores the “birth” of Brittany not as a single event but as a centuries-long emergence of a distinct cultural and linguistic boundary that Hasting must navigate as an outsider. It is a story that begins with the Roman Tractus Armoricanus, a defensive coastal district manned by Brythonic soldiers from across the Channel who formed the region’s initial military core and established the “Small Britain” that Hasting eventually encounters. These early Bretons famously delayed the Frankish conquest of Gaul, creating a “well-defended, sovereign entity” that serves as the backdrop for Hasting’s early years in the court of Nominoë. Initially written as a companion to The Saga of Hasting the Avenger, this book can also be read as a stand-alone history.

By the ninth century, the saga depicts a decentralized coalition of independent kingdoms led by local chiefs known as Machtierns, whose fierce desire for independence rendered the peninsula nearly ungovernable for the Frankish kings. The central conflict centers on the rise of Nominoë and his successors, who navigated the Carolingian civil wars to secure recognized sovereignty—a political maneuver that Hasting witnessed firsthand in The Lords of the Wind at the founding of the Abbey of Redon in 832 AD. However, the nascent Breton state was ultimately hobbled by internal divisions between the Brythonic west and the Gallo-speaking east, a rift the Vikings exploited with devastating precision when they established a Norse principality that brought the whole peninsula under their control in 921 AD. The tale of the reconquest of Brittany allowed Breton nationalists to paint a rosy picture of Breton identity and continuity, but this book argues that Brittany, as it had been, had in fact been destroyed, and the entity that replaced it was neither native nor strong enough to make it an independent kingdom again.

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