This group's ultimate defeat came as a consequence of the 13 Years War, and they were opposed by the Lizard League.  
This group's ultimate defeat came as a consequence of the 13 Years War, and they were opposed by the Lizard League.  Despite fighting the Cumans under Andrew II, they were cast out of Hungary and made their way to the Vistula to help Conrad of Mazovia.  They acquired the Order of the Brothers of the Sword in 1237.  Originally formed as a hospital for the sick during the Third Crusade by some merchants from Lubek and Bremen, they were famously defeated at the First Battle of Tannenberg.  For 10 points, name this medieval German crusading order.
This group's ultimate defeat came as a consequence of the 13 Years War, and they were opposed by the Lizard League.  
{Teutonic} Knights (or {House} of the {Hospitalers} of {Saint Mary} of the {Teutons} in {Jerusalem} or {Duetscher Ritter}-{Orden} or {Haus der Ritter des Hospitals Sankt Marien der Deutschen zu Jerusalem} or {Domus Sanctae Mariae Theutonicorum} in {Jerusalem})