sentences:  However, the reinforcements were slow to come as dukes of Poland and Germany were preoccupied with their own disputes and the Livonian Order was fighting the Semigallian uprising.The first reinforcement to the Teutonic forces arrived in early 1261, but was wiped out on January 21, 1261 by Herkus Monte in the Battle of Pokarwis.In January 1262 reinforcements arrived from the Rhineland, led by Wilhelm VII, Duke of Jülich, who was obliged by Pope Alexander IV to fulfil his crusader duties in Prussia.