What de Castries and his subordinates did not know, however, was the full extent of enemy preparations. Since that crushing disappointment seven weeks earlier, when their commander in chief had canceled the attack mere hours before it was set to start, Viet Minh soldiers and porters had been hard at work, day after bruising day. General Giap ordered that artillery positions be better prepared, that more ammunition and supplies be on hand, and that overwhelming supremacy in men and firepower be established; only then would the operation commence. Huge effort was expended installing 75mm and
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