Nation, Religion, King

[2] During the 1930s Boworadet Rebellion, official propaganda modified the nationalist motto and believed that Nation, Religion, King and Constitution would be the four factors for Siamese unity and independence.

[3] The earliest record of this slogan in Cambodia appears in the preface to the Cultural Committee's serial of world lists carried in the Khmer-language Kambuja Suryia in 1949, but most decisively, Khmer novelist Nhok Them popularized the triad with a book entitled Nation, Religion, King in 1950.

[5] From 1958 to 1963, Thai Army chief Sarit Thanarat suspended the constitution, dissolved parliament, and banned parties, using the motto Nation, Religion, King but adding, first and foremost, faithfulness to the government.

[8] Benedict Anderson compares it with the Shibboleth Orthodoxy, Autocracy, and Nationality, "an anticipatory strategy adopted by dominant dynastic groups which are threatened with marginalization or exclusion from an emerging nationally-imagined community".

It in fact matched the "three constants of post-Angkorian Cambodian political history, namely, the Buddhist monarchy, the Theravada Sangha (community of monks), and the village-based society of ethnic lowland Khmer".

The three colours of the Flag of Thailand also represent Nation , Religion and King .
Flag of the Kingdom of Cambodia
Flag of the Kingdom of Cambodia