The Vietnam War hastened the modernisation and westernisation of Thai society. The American presence and the exposure to western culture that came with it had an effect on almost every aspects of Thai life. Before the late 1960s, full access to Western culture was limited to a highly educated elite in society, but the Vietnam War brought the outside world face to face with large segments of the Thai society as never before. With US dollars pumping up the economy, the service, transportation, and construction industries grew phenomenally. The traditional rural family unit was broken down as more and more rural Thais moved to the city to find new job. This led to a clash of cultures as Thais were exposed to Western ideas about fashion, music, values, and moral standards.
French engineers constructed fortifications for the Thai and built a new palace at Lopburi for Narai. In addition, French missionaries engaged in education and medicine and brought the first printing press into the country. Louis XIV's personal interest was aroused by reports from missionaries suggesting that Narai might be converted to Christianity.
One of the numerous institutional innovations of King Trailok (1448-88) was to create the position of uparaja, or heir apparent, usually held by the king's senior son or full brother, in an attempt to regularize the succession to the throne -- a particularly difficult feat for a polygamous dynasty. In practice, there was inherent conflict between king and uparaja and frequent disputed successions
In the end it was the students that played the decisive role in the fall of the junta. Student demonstrations had started in 1968 and grew in size and numbers in the early 1970s despite the continued ban on politcal meetings. In June 1973, nine Ramkhamhaeng University students were expelled for publishing an article in a student newspaper that was critical of the government. Shortly after, thousands of students held a protest at the Democracy Student demanding the reenrollment of the nine students. The government ordered the universities shut, but shortly after backed down and allowed the students to be reenrolled.
In 1768 Taksin was crowned as King (now officially known as Taksin the Great). He rapidly re-united the central Thai heartlands under his rule, and in 1769 he also occupied western Cambodia. He then marched south and re-established Siamese rule over the Malay Peninsula as far south as Penang and Terengganu.
Ramkhamhaeng is credited with designing the Thai alphabet (traditionally dated from 1283, on the evidence of the controversial Ramkhamhaeng stele, an inscribed stone bearing the earliest known Thai writing). At its peak, stretching from Martaban (now in Burma) to Louang Phrabang (now in Laos) and down the Malay Peninsula as far south as Nakhon Si Thammarat, the kingdom's sphere of influence was larger than modern Thailand, although the degree of control exercised over outlying areas was variable.
Ministerial offices and governorships--and the sakdi na that went with them--were usually inherited positions dominated by a few families often connected to the king by marriage. Indeed, marriage was frequently used by Thai kings to cement alliances between themselves and powerful families, a custom prevailing through the nineteenth century. As a result of this policy, the king's wives usually numbered in the dozens.
The Dharmashastra remained a tool of Thai law until late in the 19th century. Beginning with the Portuguese in the 16th century, Ayutthaya had some contact with the West, but until the 1800s, its relations with neighboring nations, as well as with India and China, were of primary importance.
The army was controlled by the King's deputy and brother, the Uparat. The Burmese, seeing the disorder accompanying the overthrow of Taksin, invaded Siam again in 1785. Rama allowed them to occupy both the north and the south, but the Uparat led the Siamese army into western Siam and defeated the Burmese in a battle near Kanchanaburi.
Wealth, status, and political influence were interrelated. The king allotted rice fields to governors, military commanders, and court officials in payment for their services to the crown, according to the sakdi na system. The size of each official's allotment was determined by the number of persons he could command to work it. The amount of manpower a particular nai could command determined his status relative to others in the hierarchy and his wealth.