The airline's development and expansion was seriously hampered by the Vietnam War (1954–1975). Following the war, its first international destination was Beijing, followed by Vientiane in 1976. During that year, the airline was known as "General Department of Civil Aviation in Vietnam", and began full operations; it carried around 21,000 passengers, one-third of whom were on international flights, and of cargo. In 1978, another important destination of Vietnam Airlines was added, with flights offered to Bangkok. The late 1980s and early 1990s saw the expansion of the network to Hong Kong, Kuala Lumpur, Manila and Singapore.