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In November 1287, Nogai Khan demanded that the princes of Ruthenia show up personally leading their armies to join him on an expedition to Poland, while he and Talabuga gathered their own cavalry. He assembled what the Galician-Volhynian Chronicle referred to as "a great host" alongside his vassals on the Polish-Galician border. After leaving some men behind in Ruthenia to defend his rear, he went about planning the invasion.