For centuries prior to the introduction of the modern passport during World War I, travel documents were generally simple letters of introduction granting special access to society’s elite. They were required of some places, but not others. For a long time, up until the second half of the 19th century, it was legal for a person of any country to go to the French or Belgian consulate and obtain one of their passports for travel. It was a loosely regulated, seemingly arbitrary system. By the early 20th century, however, the modern passport was introduced—and soon came to be seen as a document that placed the trustworthiness of an individual in doubt. During World War I, in response to fears about the wrong people crossing the wrong borders, new travel document requirements were introduced to ramp up security and control emigration. This caused consternation among the public. The British became particularly offended when, in 1914, passports demanded written details about their appearance, and soon after, a photograph. These oversimplifications of identity made travelers feel as though they were being treated like criminals, complete with descriptions or mug shots. It was front page news when, in 1919, US President Woodrow Wilson needed to have a passport created so that he could travel to Versailles.