Followed by a brilliant array of fifteen hundred knights and horsemen, among whom was Arnold of Winkelried, Duke Leopold set out from Little Basle to coöperate with the forces of the Teutonic Order in the far North. Moving from eight to ten hours a day, the march being occasionally interrupted by military exercises, the army passed through several small countries, territories of the Church, and free imperial cities, until it reached Marienburg, the seat of the Order.