[1] The coup was in fact a counter-coup against the dictatorial policies of Phraya Mano, stemming from his resentment of a proposal by Pridi Banomyong, the progressive leader of the Khana Ratsadon which Phahon was a member of, to reform Thailand's economy.

After the Siamese revolution of 1932, the first coup of Thailand's history occurred on 1 April 1933 by conservative and monarchist elites led by Phraya Manopakorn Nititada, amid national debate surrounding a nationwide economic plan proposed by Pridi Banomyong, which was deemed to be a communist threat by King Prajadhipok and Mano.

[2] On 18 June, Phraya Phahon, a member of Pridi's Khana Ratsadon and a minister of state, resigned from his seat in the People's Committee, citing health reasons.

Phahon partnered with Luang Suphachalasai of the Navy and garnered support from the armed forces, fellow party members and Bangkok's populace for the eventual coup.

He immediately recalled the People's Assembly and asked the Speaker to submit to King Prajadhipok at the Klai Kangwon Palace in Hua Hin, the reasons for the coup.