 By July 7 , the 21st Infantry Regiment had been established at Chochiwon , one of two roads to the Kum River and Taejon . The regiment was ordered to keep the road through the region open so supplies and ammunition could flow through it to the 34th Infantry Regiment on the front lines . The Americans spent several days unloading supplies from locomotives in the village . After blowing up all bridges north of the town , 1st Battalion was established on the Chochiwon road at Chonui , 12 miles ( 19 km ) south of Chonan . Supporting it were one battery of 155 @-@ mm howitzers from the 11th Field Artillery Battalion and A Company of the 78th Heavy Tank Battalion with M24 Chaffee light tanks , as well as B Company of the 3rd Engineer Combat Battalion which was assigned to construct roadblocks and prepare bridges for demolition . 
