I read this in high school in the late 1980s and asked myself, "Why wasn't this mandatory reading at West Point in the late 1950s and 1960s?"
This book, in conjunction with Ho Chi Min's writings on the use of guerrilla warfare, is the absolute basic understanding of the Viet Nam War from back BEFORE the French Foreign Legion were fighting for their colony. EVERYTHING, and I do mean EVERYTHING, in this book is used in the fight against the French right up to Dien Bien Phue, and continued up until the fall of Saigon in 1975. EVERYTHING. Why did America lose the Viet Nam War? Read this. How could America have been so wrong to back Ho Chi Min, Chaing Chi Chek, and Kim Il Song, in the Second World War? Read this.
You will say, "Wow" many times throughout the book, and in the end you will ask, "When was this first printed? How the bleep could we have been so wrong?"