Early coastal polities: 5th century BCE – 5th century CE Present-day peninsular Thailand has long been considered an important area in social interaction as the gateway between the
South China Sea and the
India Ocean since the protohistoric period (c. 500 BCE–500 CE). by adopting Indic ideologies to extend power as well as institutionalizing god-king status and dynamic traditions. Tambralinga was one of the significant centralized polities in the area that was mentioned by Indian literature of the 2nd century CE. Scholars have assumed that Tambralinga was situated near modern
Nakhon Si Thammarat (Ligor), which appears valid based on text given in inscription No. 28 found in Phra Maha That temple at the center of modern Nakhon Si Thammarat, engraved with
Pallava scripts in
Sanskrit language dated to the 5th century CE, which mentions the
Tambralingeshvra meaning the "
Siva of Tambralinga" or "Lord of Tambralinga". In this era, Tambralinga consisted of five main mandalas located on the bank of Khlong Tha Khwai, Khlong Tha Chieo – Tha Thon, Khlong Tha Lat, Maying River, and the largest one on the Haad Sai Keao dune, which was speculated to be the center of Tambralinga. According to the legend of Nakhon Si Thammarat, Phraya Sri Thammasokaraj or Norabadi (; ) from the
Mon Hanthawaddy, together with his younger brother named Dharanont (), brought their relatives and 30,000 soldiers, along with two Monks Phra Phutthakhamphien () and Phra Phutthasakon (), south to settle in Khao Chawa Prab () in present-day
Krabi Province and later relocated to establish
Nakhon Si Thammarat.
Golden age: 10th – mid 13th centuries North expansion: 10th – 11th centuries During the 10th–11th centuries, after gaining independence from
Srivijaya by the liberation of King Sujita, During this period, at Angkor's
Yaśodharapura to the northeast, since the reign of
Candravaṃśa's
Jayavarman V of the Bhavapura house (r. 968–1001), the aristocratic families dominated the royal court. The throne then fell into two Tambralinga princes,
Udayadityavarman I and
Jayavirahvarman, who ruled Angkor from 1001–1011, which considered the period of the 9-year civil war between the two brothers and
Suryavarman I of the
Shailendra dynasty who controlled the east and southern regions and was supported by the Bhavapura house of the overthrown king. In contrast, according to the Prasat Khna Inscription (K.1312), some scholar believe that Narapativiravarman was Sujita, the successor king of both Tambralinga and
Lavo, who gave the throne at Tambralinga to his younger brother,
Udayadityavarman I, in 1001, and then successfully launched a campaign to conquer
Yaśodharapura and enthroned
Jayavirahvarman, a new Angkorian king, the following year. In the same year,
Udayadityavarman I of Tambralinga/Lavo was replaced by his nephew, a usurper named
Suryavarman I or Kampoch, who also allied with the house of the overthrown Angkorian king,
Jayavarman V, and waged war against Jayavirahvarman to control
Yaśodharapura. or Inthapat Nakhon (possibly
Yaśodharapura Thai academic proposes that after losing the war to the
Chola Empire in 1026, the center of power in the eastern Siam peninsula was shifted from
Chaiya to
Nakhon Si Thammarat (Ligor) in 1077, according to the information given to the Chinese court by the diplomat sent in 1168. The previous king's son was enthroned as the new ruler. as recorded in the Dhammarajaka inscription, which gives the southern limits of the kingdom to
Takwā (
Takua Pa),
Salankre (Junk Ceylon?,
Phuket) and two other places hardly legible, ending with a city with the suffix
nakuiw' (nagara). Meanwhile, D.K. Wyatt said Tambralinga was the vassal of the
Pagan Kingdom from 1130–1176, with the agreement of the King of Sri Lanka. This quarrel would continue and be the cause of the
invasion of Sri Lanka in 1247 by
Chandrabhanu, whose lineage was believed to have moved from the north. The relationships between Tambralinga and the
Tai leaders in the north of the
Kra Isthmus was speculated to have begun during the reign of
Chandrabhanu I, In 1244, King Chandrabhanu
invaded Sri Lanka, adopting the regnal name 'Srīdḥarmarāja' and installing himself as the king of
Jaffna. This era ended with the losses of Tambralinga in the
1247–1270 Tambralinga–Sri Lanka Wars. Several local legends said the Padmavamsa clan ended due to the plague. In 1365
Majapahit, the Kingdom of Java, recognized Nakorn Sri Dharmaraja as
Dharmanagari written in the
Nagarakretagama. Despite its rapid rise to prominence in the 13th century, that is, by the following century Danmaling, or Tambralinga, the former member state of Sanfoshih –
Javaka, had become a part of Siam (
Ayutthaya Kingdom). ==Warfare==