Mezue ahịrịokwu na-esonụ: Etinyere na Russia na Eastern Europe n'oge mbuso agha Mongol (1237<unk>1242), egwuregwu ahụ nwere agbụrụ atọ nwere ike igwu egwu <unk> Mongols, Russians, na Crusaders <unk> onye ọ bụla nwere mkpọsa nke ya, nke na-ekpuchi mgbe ụfọdụ na abụọ ndị ọzọ. Mgbasa ozi ndị ahụ na-egosipụta ihe osise nke akụkọ ihe mere eme dị ka Batu Khan, Burundai, Jebei, Subutai, Yuri Ingvarevich, Yuri Vsevolodovich, Evpaty Kolovrat, Alexander Yaroslavich, Birger Magnusson, na Herman von Salza, ma gosipụta ihe omume ndị dị ka ọdịda nke Ryazan, Agha nke Osimiri Sit, Siege nke Kolomna, Agha nke Neva na
Agha A Na-alụ n'Oké Osimiri.