Wani karamin da'irar daga tashin bourgeoisie na tsofaffin ɗalibai (dukkanin waɗanda suka kammala karatunsu a Turai - galibin Paris), waɗanda wasu sojoji suka goyi bayansu, suka kwace mulki daga cikakkiyar masarauta a ranar 24 ga Yuni 1932 a kusan juyin juya halin rashin tashin hankali.Kungiyar, wacce ta kira kansu Khana Ratsadon ko masu daukar nauyi, ta tattara hafsoshi, hazikai da masu rike da mukamai, wadanda ke wakiltar ra'ayin kin amincewa da cikakken tsarin sarauta.Wannan juyin mulkin soja (na farko na Thailand) ya kawo karshen mulkin Siam na tsawon shekaru aru-aru na cikakken mulkin sarauta a karkashin daular Chakri, kuma ya haifar da juyin juya halin rashin jinni na Siam zuwa tsarin mulkin tsarin mulki, gabatar da dimokuradiyya da kundin tsarin mulki na farko, da kuma kafa majalisar dokoki ta kasa.Rashin gamsuwa da tabarbarewar tattalin arziki, da rashin samun ingantacciyar gwamnati da kuma tasowar talakawa masu ilmin yammacin duniya ne suka haifar da juyin juya hali.