Complex sentence: In attempts to reclaim Singora, Ayuthaya launched at least three maritime attacks during Sulaiman's reign: each campaign failed; one ended in ignominy when the Siamese admiral "ran away".
Split into simpler sentences: In attempts to reclaim Singora, Ayuthaya launched at least three maritime attacks during Sulaiman's reign. Each campaign failed; one ended in ignominy when the Siamese admiral "ran away".