Realizing that it was difficult to oppose Tang only with old forces in Silla, King Munmu also put effort into reorganization of Silla's class system by taking in people who were originally from Baekje and Goguryeo.
古くからの新羅の勢力だけでは唐への対抗が難しいことに気付いた文武王は、百済・高句麗両国の遺民を取り込んで新羅の身分制度を再編することにも努めた。