 The rest of the 1st Platoon was then pinned down when the VC, from within concealed bunker positions, fired on them using captured M60 machine-guns.The VC steadily increased their fire which came in the form of various small arms, .50 caliber and 12.7mm machine guns.Unable to communicate with the 1st and 2nd Platoons, George moved forward with the 3rd Platoon only to find his lead platoons held in their positions by enemy fire.