 Langlais' report on the operation left no doubt that long range offensive operations from Dien Bien Phu were not feasible.Langlais' advice was ignored and offensive operations continued through January and into February 1954, although the tightening Viet Minh siege ring meant that raids were increasingly encountering Viet Minh forces within a few kilometres of the central position at Dien Bien Phu.On 17 February, faced with ongoing losses to the garrison, General René Cogny ordered that henceforth only light reconnaissances be conducted by limited numbers of personnel.