Simplify the following text for a Grade 11 native English-speaking person.
Original: As the Reconquista was very successful after the conquest of Cordoba in 1236 , the emirate officially became a tributary state in 1238 and was called the Kingdom of Granada .
Simplified: With the Reconquista in full swing after the conquest of Cordoba in 1236 , the Moorish Nasrid dynasty aligned themselves with Ferdinand III of Castile , officially becoming a tributary state in 1238 . The state officially became the Kingdom of Granada in 1238 .