In 2005 and 2006, a series of events occurred in Thailand as a result of an unrest with Thaksin Shinawatra that was supported by Sondhi Limthongkul and his coalitions. It led a military coup that concluded in the overthrow of the Thai Rak Thai government in September 2006, the flight of Thaksin after the court verdict, and the establishment of the junta government led by Surayud Chulanont, a favourite of privy councillor and senior statesman Prem Tinsulanonda.
The crisis and resulting coup and post-coup military government called into question issues of media freedom, the role of the constitution in breaking a political deadlock, and the existence of political stability in Thailand. It also reflected long-term and significant disparity between urban and rural political orientation and abuses of power and conflict of interest of a democratically elected leader that have long plagued the Thai political landscape. These issues contributed to the crisis and culminated in the coup d'état of September 2006.
Sondhi Limthongkul, a media mogul who had previously been a staunch supporter of Thaksin, played a major, leading role in the crisis through the establishment of the anti-Thaksin People's Alliance for Democracy. The PAD aligned itself with several state-enterprise unions (who were against Thaksin's privatisation plans for state enterprises), human right and civil politics activists who charged Thaksin rule as "undemocratic", monopoly of power, human right abuse, suppressing the freedom of press and extrajudicial killing of the War on Drugs, a main concern among several human right groups.
The crucial anti-Thaksin coalitions were also supporters of the controversial monk Luang Ta Maha Bua (who opposed the Thaksin government's appointment of Somdet Phra Buddhacharya as acting Supreme Patriarch in place of the critically ill Somdet Phra Yanasangworn), allegedly the political intervention of the monastic affairs.