Surat Thani in the context of Ko Tao

The Tenasserim Hills or Tenasserim Range (Burmese: တနင်္သာရီ တောင်တန်း, [tənɪ̀ɰ̃θàjì tàʊɰ̃dáɰ̃]; Thai: ทิวเขาตะนาวศรี, RTGS: Thio Khao Tanao Si, pronounced [tʰīw kʰǎw tā.nāːw sǐː]; Malay: Banjaran Tanah Seri/Banjaran Tenang Sari) is the geographical name of a roughly 1,700 km long mountain chain, part of the Indo-Malayan mountain system in Southeast Asia.

Despite their relatively scant altitude these mountains form an effective barrier between Thailand and Myanmar in their northern and central region. There are only two main transnational roads and cross-border points between Kanchanaburi and Tak, at the Three Pagodas Pass and at Mae Sot. The latter is located beyond the northern end of the range, where the Tenasserim Hills meet the Dawna Range. Minor cross-border points are Sing Khon, near Prachuap Khiri Khan, as well as Bong Ti and Phu Nam Ron west of Kanchanaburi. The latter is expected to gain in importance if the planned Dawei Port Project goes ahead, along with a highway and a railway line between Bangkok and that harbor.

Thesaban (Thai: เทศบาล, RTGS: thetsaban, pronounced [tʰêːt.sā.bāːn], Pali: desapāla, lit. 'protector of region') are the municipalities of Thailand. There are three levels of municipalities: city, town, and sub-district. Bangkok and Pattaya are special municipal entities not included in the thesaban system.

The municipalities assume some of the responsibilities which are assigned to the districts (amphoe) or subdistricts (tambon) for non-municipal (rural) areas. Historically, this devolution of central government powers grew out of the Sukhaphiban (สุขาภิบาล) sanitary districts first created in Bangkok by a royal decree of King Chulalongkorn in 1897.

Patani Darussalam (Malay: Kesultanan Patani Darussalam, Jawi: كسلطانن ڤطاني دارالسلام, also sometimes Patani Raya or Patani Besar, Greater Patani; Thai: ปตานี) is a historical region and sultanate in the Malay Peninsula. It includes the southern Thai provinces of Pattani, Yala (Jala), Narathiwat (Menara), and also parts of Malaysia modern state Kelantan and Besut district in state of Terengganu. Its capital was the town of Patani.

The Patani region has historical affinities with the Singgora (Songkhla), Ligor (Nakhon Si Thammarat), Lingga (near Surat Thani) and Kelantan sultanates dating back to the time when the Patani Kingdom was a semi-independent Malay sultanate paying tribute to the Siamese kingdoms of Sukhothai and Ayutthaya. After Ayutthaya fell to the Burmese in 1767, the Sultanate of Patani gained full independence, but under King Rama I, it again came under Siam's control.