Phở is a Vietnamese soup dish consisting of broth, rice noodles (bánh phở), herbs, and meat (usually beef Beef (phở bò), sometimes chicken (phở gà)). Phở is a popular food in Vietnam where it is served in households, street stalls and restaurants countrywide. Phở is considered Vietnam's national dish. Phở originated in the early 20th century in northern Vietnam, and was popularized throughout the world by refugees after the Vietnam War. Because phở's origins are poorly documented, there is disagreement over the cultural influences that led to its development in Vietnam, as well as the etymology of the name. The Hanoi (northern) and Saigon (southern) styles of phở differ by noodle width, sweetness of broth, and choice of herbs.