 Acting on MacArthur 's instructions , General Walton Walker of the Eighth Army started the Home @-@ by @-@ Christmas Offensive at 10 a.m. on November 24 , 1950 . With a reconstituted ROK II Corps placed on the Eighth Army 's right flank , the advance was led by the US I Corps to the west , US IX Corps in the center , and the ROK II Corps to the east . The three UN Corps advanced cautiously in a continuous front line in order to prevent more ambushes similar to the Chinese First Phase Campaign , but the lack of manpower stretched the UN forces to the limit . Except for the strong Chinese resistances against the ROK II Corps , the Eighth Army met little opposition , and the line between Chongju to Yongwon was occupied on the night of the November 25 . 
