Điện Biên Phủ Campaign: victory belief in a Lieutenant General's indelible memory
Lieutenant General Đặng Quân Thụy said the confidence in victory stemmed from the summer of 1953, when the General Staff established a research team of 24 people in the dense forests of Định Hóa base (in the northern mountainous province of Thái Nguyên) to ’prepare theories for attacking enemy strongholds.’
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Source: vietnamnews.vn