The period began with the invasion of the Alans, Sueves, and Vandals in , which signaled the end of Roman imperial rule. The Visigoths, initially Roman allies ( foederati ), gradually expanded their control over the peninsula, officially establishing an independent kingdom in 475 CE . Political Evolution :
: After losing their territories in Gaul to the Franks in 507 CE, the Visigoths moved their center of power to Toledo.
: Under King Leovigild (r. 569–586), the kingdom annexed the Suevic territories and pushed back Byzantine enclaves, effectively uniting the peninsula for the first time.
The Visigothic period in Spain (409–711 CE) represents a critical bridge between the collapse of Roman authority and the Islamic conquest, characterized by the first political unification of the Iberian Peninsula.
: Internal aristocratic infighting and military weakness led to a swift collapse when Tariq ibn Ziyad led a Berber-Arab force across the Strait of Gibraltar. King Roderic was defeated and killed at the Battle of Guadalete . Governance and Society 2 Visigothic Spain 409–711 - Oxford Academic