The three belonged to the "Rajakru clan", a military, economic and political interest group established by Field Marshal Phin.

[2] During the campaign for the election in April 1976, the party called for "the Right to kill the Left", and party chairman and Deputy Prime Minister Pramarn declared in a cabinet meeting on October 6, 1976, that it was the right moment to destroy the student movement, which was eventually executed in the Thammasat University massacre.

"[5] In the general election of 1988, the Thai Nation Party won the most votes, resulting in its leader Chatichai Choonhavan becoming the prime minister.

The Thai Nation Party advocated a reinforcement of the role of Parliament, in which many businessmen from the province were represented who had gained wealth and growing political ambitions, vis-à-vis the traditionally powerful, but not democratically legitimised administration.

After the March 1992 general election, the Thai Nation Party — now led by Air Chief Marshal Somboon Rahong — joined a military-sponsored coalition led by the Justice Unity Party (Samakkhi Tham), under coup leader General Suchinda Kraprayoon.

[8] After return to democracy in 1992, the Thai Nation Party became the main opposition force against the Democrat-led government of Chuan Leekpai.

[9] In 1994 Banharn Silpa-archa, a billionaire construction building contractor and "godfather of Suphan Buri", became the party's chairman.

The party lost some seats in the 2005 elections, despite the support of the popular politician and former "massage parlour" owner Chuwit Kamolvisit.