The Bombardment of Tourane (15 April 1847) was a naval incident that took place during the short reign of the Vietnamese emperor Thiệu Trị (1841–47), which saw a considerable worsening of relations between France and Vietnam. The French warships Gloire and Victorieuse, which had been sent to Tourane (now Da Nang) to negotiate for the release of two French Catholic missionaries, were attacked without warning by several Vietnamese vessels. The two French ships fought back, sinking four Vietnamese corvettes, badly damaging a fifth, and inflicting just under 1,200 casualties. In response to this and other provocations, the French eventually decided to intervene actively in Vietnam, and a decade later launched the Cochinchina Campaign (1858–62), which inaugurated the period of French colonial r