 The Chinese established a number of road blocks in the area before proceeding to assault the American gun line and the nearby bridge . The attack cut the road to Anju which was the 27th British Commonwealth Brigade 's single means of resupply or withdrawal , and exposed the only available crossing over the Chongchon River . Coad considered that unless the Chinese could be cleared from the gun position and the hills secured , the brigade was in danger of being surrounded and cut off and the crossing at Anju lost , while US 19 RCT would also be threatened . Under the command of Lieutenant Colonel George Neilson , the Argylls were despatched to restore the situation . B and C Companies would be drawn back from the west bank of the <unk> to reinforce A Company , and then attack south one after the other supported by American tanks . At the same time A Company — under Major Alexander Wilson — was ordered to immediately attack north to clear the road . Hasty control measures were put in place to avoid the possibility of the two forces accidentally engaging one another , while air support was requested at 08 : 40 . After commandeering two American trucks , Wilson 's men stepped off with four US M4 Sherman tanks in support . 
