After this date there is again a gap of more than a century in Cambojan history, and when the sequence of events becomes clear again, we find that Siam has grown to be a dangerous and aggressive enemy. But though the vigour of the kingdom may have declined, the account of the Chinese traveller Chou Ta-kuan who visited Angkor Thom in 1296 shows that it was not in a state of anarchy nor conquered by Siam. There had however been a recent war with Siam and he mentions that the country was devastated. He unfortunately does not tell us the name of the reigning king and the list of sovereigns begins again only in 1340 when the Annals of Camboja take up the history. They are not of great value. The custom of recording all events of importance prevailed at the Cambojan Court in earlier times but these chronicles were lost in the eighteenth century. King Ang Chan (1796-1834) ordered that they should be re-written with the aid of the Siamese chronicles and such other materials as were available and fixed 1340 as the point of departure, apparently because the Siamese chronicles start from that date[268]. Although the period of the annals offers little but a narrative of dissensions at home and abroad, of the interference of Annam on one side and of Siam on the other, yet it does not seem that the sudden cessation of inscriptions and of the ancient style of architecture in the thirteenth century was due to the collapse of Camboja, for even in the sixteenth century it offered a valiant, and often successful, resistance to aggressions from the west. But Angkor Thom and the principal monuments were situated near the Siamese frontier and felt the shock of every collision. The sense of security, essential for the construction of great architectural works, had disappeared and the population became less submissive and less willing to supply forced labour without which such monuments could not be erected. The Siamese captured Angkor Thom in 1313, 1351 and 1420 but did not on any occasion hold it for long. Again in 1473 they occupied Chantaboun, Korat and Angkor but had to retire and conclude peace. King Ang Chan I successfully disputed the right of Siam to treat him as a vassal and established his capital at Lovek, which he fortified and ornamented. He reigned from 1505 to 1555 and both he and his son, Barom Racha, seem entitled to rank among the great kings of Camboja. But the situation was clearly precarious and when a minor succeeded to the throne in 1574 the Siamese seized the opportunity and recaptured Lovek and Chantaboun. Though this capture was the death blow to the power of the Khmers, the kingdom of Camboja did not cease to exist but for nearly three centuries continued to have an eventful but uninteresting history as the vassal of Siam or Annam or even of both[269], until in the middle of the nineteenth century the intervention of France substituted a European Protectorate for these Asiatic rivalries.