In the centuries that followed, up to the final decline of Srivijaya, Langkasuka-Kedah was one of its closest allies and Kedah rose to become a principal port and even the seat of the Srivijayan Maharaja. Langkasuka-Kedah's fortune were, therefore intertwined with Srivijaya's, and the former's decline only came after the fall of the latter to Chola raids from South India in the 11th century. The power vacuum left by the collapse of Srivijaya was filled by the rise of Nakhon Si Thammarat Kingdom, commonly known in Malay tradition as 'Ligor'. By the 13th century, the kingdom succeeded to incorporate most of the Malay Peninsula including Pahang under its mandala. During this period, Pahang, designated as "Muaeng Pahang" was established as one of the twelve naksat city states of Ligor. In the early 14th century, the fortune of Ligor was in turn eclipsed by the rise of Thai Buddhist power, and the expansion southwards by Ram Khamhaeng of Sukhotai who brought it under Thai hegemony.