In 1591, the Long Turkish War began. The Habsburg Monarchy (Austria, Bohemia, Hungary, Croatia, and Moravia) joined the Transylvanian and Ottoman vassal states of Moldavia and Wallachia. Several European states also sent troops to Hungary. The Papal State primarily recruited foreign Walloon and Italian mercenaries for the war. The Habsburg and Spanish kings also employed Walloon mercenaries in addition to German, Italian and Spanish soldiers.