100' ("Mobile Group 100" or GM.100) which included the elite veteran UN 'Bataillon de Corée' (I/Corée) that had fought in the Korean War was transferred to French Indochina.

GM.100 was hit in a series of deadly ambushes in the Battle of Mang Yang Pass, suffering heavy losses in men and vehicles by 29 June.

[2] On 29 June, the French headquarters in the coastal town of Nha Trang received intelligence that the Viet Minh had infiltrated the area along Route Coloniale 14 between Pleiku and Ban Mê Thuột.

GM.42 led by veteran Lieutenant colonel Jacques Sockeel, was to be sent out on Operation Myosotis (Forget-Me-Not) with orders to keep the road open.

As they approached the dangerous Chu Dreh Pass, the Montagnard infantry slowly got through without trouble, while I/Corée and the artillery formed the rearguard.

[6] At 10:50, they had left the southern end of the pass when the 8th Montagnard battalion and the Brigade HQ of I/Corée were suddenly attacked by the Viet Minh.

Other units around the choke points of the ambush were trying to fight their way out northwards by leap frogging, and at the same time dragging their wounded.

The handful of Frenchmen that were left broke out and retreated through the deep jungle and after an exhausting four day trek, all made it back to Ban Dôn, a small village just North of Buôn Ma Thuột.

[11] The Viet Minh had by this time conquered a substantial part of the Central Highlands including the towns of Kontum and An Khê.