The Tà tū-tū fŭ (大都督府,Grand Military Commission) was a military command system that was established on the frontline with Song for a short time in the early Yuan Dynasty. Its organization had láng-chūng (郎中,Gentleman of Interior) for civil affairs, Lĭ-wèn (理問所,Judicial Secretary) for judicial interrogate, and Chèn-fŭ (鎮撫,Judge) as the chief of military staff and military judge. Tà tū-tū fŭ usually leads several wan-hu (萬戶,myriarch) and ch'ien-hu (千戶,chiliarchy). Its main tasks were to warn the Southern Song and responsible for military-civil affairs in the frontline area. Mainly the Chinese military lords (漢人世侯,the warlords who lead Northern Chinese armies [Han armies] ) served as the Ta tu-tu, including Li T'an, the I-tu hsíng-shěng (the branch secretariat of I-tu) of Shandong, Shih Ch'üan, the Chen-ting wan-hu (myriarch of Chen-ting), and Chang Hung, the Chi-nan wan-hu (myriarch of Chi-nan). The power of the chinese military lords was eliminated by the Mongol court after Li T'an was suppressed, then the Tà tū-tū fŭ of the Northern Chinese armies were also abolished.