 Thirty minutes later, about 1 km north of the base, Companies F and G encountered a PAVN Company which withdrew under cover of 60mm mortar fire; two Marines were killed and 8 wounded for 3 PAVN killed.In late January, with increasing PAVN pressure on Khe Sanh Combat Base and Route 9, 1st Battalion 9th Marines was transferred to Khe Sanh and 3rd Battalion 4th Marines was moved to the Lancaster area of operations.2nd Battalion 4th Marines was assigned to take over the 3/4's area of operations northeast of Con Thien, and on 27 January, HMM-361 landed the first units near C-2; by the end of the day the entire battalion was deployed.