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Ferdinand I Unites León and Castile

Type Event Region Iberia Time 1037

In 1037, Castilian Count Ferdinand I defeated and killed King Bermudo III of León at the Battle of Tamarón, merging the Kingdom of León with Castile …

Timeline

  1. 1035–1037León · LeónFerdinand I married the Leónese princess Sancha, giving him a claim to the throne of León. After Bermudo III acceded, he refused to yield, and armed conflict broke out over control of the Duero River basin, escalating the standoff between Castile and León.
  2. 1037Tamarón · Castile–LeónFerdinand's forces defeated the Leónese army at Tamarón, and Bermudo III was killed in battle. Ferdinand then took possession of León, styling himself 'King of León and Castile'; the two kingdoms were politically united under a single ruler for the first time, paving the way for Castile's later dominance of Iberian politics.

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