Dog meat is the flesh and other edible parts derived from dogs. Historically, human consumption of dog meat has been recorded in many parts of the world. During the 19th century westward movement in the United States, mountainmen, Native Americans, the U.S. Army, as well as the Confederacy during the American Civil War frequently had to sustain themselves on dog meat; first to be consumed would be the horses, then the mules, and lastly the dogs. In the 21st century, dog meat is consumed to a limited extent in South Korea, China, Indonesia, Nigeria, Switzerland, and Vietnam, and it is eaten or is legal to be eaten in other countries throughout the world. Some cultures view the consumption of dog meat as part of their traditional, ritualistic, or day-to-day cuisine, and other cultures consider consumption of dog meat a taboo, even where it had been consumed in the past. Opinions also vary drastically across different regions within different countries. It was estimated in 2014 that worldwide, 27 million dogs are eaten each year by humans.