PULO was founded in India by Pattani aristocrat and Islamic scholar Kabir Abdul Rahman (aka Tungu Bira Kotanila) as a nationalist and separatist group. According to Peter Chalk of RAND, "PULO's ideology is based on the UBANGTAPEKEMA, an acronym derived from Ugama, Bangsa, Tanach, Air, and Perikemanusiaan (Religion, Race/Nationalism, Homeland, and Humanitarianism)."
The group originally aimed to establish an independent Muslim state in southern Thailand, but differing ideologies and counterterrorist operations resulted in a weakened and divided PULO. By the late 1990s, the group was largely ineffectual. At the height of the Thai insurgency in the 1970s, PULO (along with other groups) had perhaps some 1,000 guerrillas. By the 1980s, this number had fallen to 500; by 2000, these separatist groups could count on perhaps 100 fighters.
A "reunification congress" of 40 top leaders, meeting in Damascus, Syria, from April 29 to May 1, 2005, rejuvenated the PULO organization. Leadership was passed to Tungu Bira Kotanila, who heads the group while in exile. Other individuals in leadership positions include PULO's vice president, Razi Bin Hassan, and foreign affairs chief Kasturi Mahkota. Since this meeting and the January 2004 offensive, the group (along with New PULO) has stepped up activities.
Based abroad, PULO leaders have little actual operational control over group members.
Ar-rong Moo-reng and Hayi Abdul Rohman Bazo formed the splinter group New PULO in 1995 -- when the original PULO was largely defunct -- with a greater emphasis on Islam. New PULO is organized geographically, under the lead of a supreme Armed Force Council. This body coordinates and directs three wings: the Sali Ta-loh Bueyor group is responsible for the Narithiwat distrcits of Ja-nae and Sri Sakhon; the Maso Dayeh group has responsibility for Yala's Betong district; and the Ma-ae Tophien group runs operations in all districts throughout Narathiwat and Yala.
Following numerous terrorist attacks from 1997-1998, Kuala Lumpur cooperated more closely with Bangkok, resulting in a significant degradation of PULO and New PULO capabilities due to the arrests of four top leaders. Bazo and his deputy, Hadji Mae Yala, were handed over by Malaysian authorities to Bangkok in 1998. Some 900 militants also agreed to join government rehabilitation programs at this time, promising to participate in peaceful development. Other leaders fled abroad, including Tunku Bilor Kortor Nilor, former PULO leader; Ar-rong Moo-reng, New PULO founder; and deputy Haji Abdul Hadi bin Rozaali .
After the arrests, Saarli Taloh-Meyaw succeeded to the leadership position in New PULO until he was killed by Thai security forces in February 2000. Kamae Yusof may now be the New PULO leader. New PULO members such as Marudee Piya (head of operations in Narathiwat) and Paosee Yi-ngor (a demolitions expert) have trained overseas and are on most-wanted lists in Thailand.
Both PULO and New PULO are relatively inactive nowadays. Other Muslim separatist groups have stepped up violence in southern Thailand.