Rubuta ci gaba ga wannan sakin layi - A Faransa, sabon juyin juya hali
ya hambarar da Louis Philippe a shekara ta 1848. Louis Napoleon ya zama shugaban kasa, sannan kuma Sarkin Faransa. Don shiga tsakani a Vietnam da kuma fadada Daular Faransa, a ranar 22 ga Afrilu 1857 Napoleon III ya kirkiro Kwamitin de la Cochinchine tare da Baron Brennier a matsayin shugabanta, tare da manufofin shirin ne don cin nasarar Vietnam da kama sarkin Vietnam, ta amfani da Tự Đức na tsananta wa Katolika da kuma yarjejeniyar da aka soke ta 1787 a matsayin hujja don cin nasara. A cikin wannan shekarar, Tự Đức ya kashe firistocin Dominican na Spain guda biyu; Faransa da Spain sun ayyana yaƙi kuma sun kaddamar da mamaye Vietnam.