Duke Frederick II of Austria, who arrived to assist Béla against the invaders, defeated a small Mongol troop near Pest. He seized prisoners, including Cumans from the Eurasian Steppes who had been forced to join the Mongols. When the citizens of Pest realized the presence of Cumans in the invading army, mass hysteria emerged.
Duke Frederick II of Austria, who came to aid Béla against the attackers, defeated a small Mongol group near Pest. He captured prisoners, including Cumans from the Eurasian Steppes who had been compelled to join the Mongols. When the citizens of Pest learned about the presence of Cumans in the invading army, widespread panic ensued.