On June 29, the remains of 1st Korea Battalion was ordered to take part in Operation Myosotis to open Route Coloniale 14 between Pleiku and Ban Mê Thuột which was over 96 kilometers away. On July 17, the column was ambushed at Chu Dreh Pass by local units of the Việt Minh 96th Regiment. When the survivors finally arrived at Ban Mê Thuột the following day, there were only 107 men remaining out of 452, of those 53 were wounded, in addition a further 47 vehicles were lost.