Pho is a Vietnamese noodle soup consisting of broth, linguine-shaped rice noodles called bánh phở, a few herbs, and meat. It is primarily served with either beef or chicken. Pho is a popular street food in Vietnam and the specialty of a number of restaurant chains around the world. Southern Vietnamese eat it for breakfast and occasionally lunch, whereas northerners eat it at any time of day. Pho originated in the early 20th century in northern Vietnam. War refugees later popularized it in the rest of Vietnam and the world. Because pho's origins are poorly documented, there is significant disagreement over the cultural influences that led to its development in Vietnam, as well as the etymology of the word itself. The Hanoi and Saigon styles of pho differ by noodle width, sweetness of broth, and choice of herbs. A related beef noodle soup, bún bò Huế, is associated with Huế in central Vietnam. *** Description sourced from Wikipedia.