Khana Ratsadon (Thai: คณะราษฎร; meaning "People's Party"), was a Siamese group of military and civil officers, and later a political party, which staged a bloodless coup against King Prajadhipok and transited the country's absolute monarchy to constitutional monarchy on 24 June 1932.
Read more about Khana Ratsadon: Legacy, Members of Khana Ratsadon