 On the early morning of 17 February PAVN sappers attacked Firebase Cunningham resulting in 4 Marines and 37 PAVN killed.On 18 February Company A, 1/9 Marines encountered a PAVN bunker system which they overran killing 30 PAVN.The following morning Company C continued the attack against nearby PAVN positions killing a further 30 PAVN with total Marine losses of 1 killed.