Complex sentence: In the case of the Kingdom of Portugal it happened in the 13th century; in the Algarve, the combined forces of Aragon and Castile defeated the last Iberian Muslim strongholds in the 15th century.
Split into simpler sentences: In the case of the Kingdom of Portugal it happened in the 13th century; in the Algarve. The combined forces of Portugal Aragon and Castile defeated the last Iberian Muslim strongholds in the 15th century.