The wandergesellen guild associations developed in the Middle Ages as a type of trade union for travelling tradesmen. All members begin their journey with a pledge not to return home for three years and to abide by the strict customs of their guild. They travel the back roads of Europe, remaining in each job for only a few months and cherishing their status as freemen. "On the waltz you're very free. You can do everything," states Ludwig Hensen. His friend David agrees: "you get to see the world and learn more of your trade ... to sow your wild oats and enjoy life." Although this practice was almost obliterated during the second world war, recent economic trends have encouraged a revival. "When there's no work, people start travelling," states David. Many enjoy their waltz so much that they are reluctant to return home.