...his control over the Nantais is contested by Fulk I of Anjou, though Alan holds the upper hand during his lifetime.

A Strong and Wealthy Ruler

• Alan's power base remains in southeastern Brittany, particularly around Vannes and Nantes, where he amasses great wealth and land.
• His control over Frankish territories solidifies Brittany’s independence from West Francia, ensuring that it is not merely a vassal state of the Carolingians.

The Last Ruler of a Unified Brittany

• Alan I is the last ruler to govern all of Brittany and its adjacent Frankish territories as a unified realm.
• After his death, Brittany will never again reach this level of political and territorial unity, as internal divisions and external pressures fragment the region.

Legacy of Alan I

• His reign represents the pinnacle of Breton independence, securing territories beyond Brittany itself.
• He successfully defends Breton sovereignty against Frankish and Viking threats.
• His rivalry with Fulk I of Anjou foreshadows the future struggles between Brittany and Anjou, particularly in the 11th and 12th centuries.

Alan I’s rule stands as the golden age of Breton expansion, marking the height of Brittany’s influence in medieval Europe.