French fries are one of the most commonly eaten foods in the world. They are very popular with fast food restaurants. The expression 'French Fried Potatoes' was first used in English in an 1856 book called 'Cookery for Maids of All Work'. In the early 20th century, the term 'French fried' was being used to mean 'deep-fried'. Food historians say French fries actually come from Belgium and not France. Both countries say they were the first company to cook French fries. Belgians say the word 'French fries' is used instead of 'Belgian fries' because France has a worldwide image for good food. Some people think the term 'French' was used when U.S. soldiers arrived in Europe during World War I.