Seaport city (pop., 2003 est.: 590,800), central Vietnam. It was first ceded to France in 1787, and after 1858 it became a French concession beyond the jurisdiction of the protectorate. Da Nang increased in importance after the partition of Vietnam in 1954, and during the Vietnam War it was the site of a U.S. military base. Its port has an excellent deepwater harbour; its manufactures include textiles and machinery.