Thirty years ago, Vietnamese soldiers waged a final, furious battle in the hills of Lang Son near the country's northern border to push back enemy troops.

三十年前，越南士兵在北部边界附近的谅山展开最后的激战以击退敌军。

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Not until the fourth year of our major buildup did we finally adopt an approach that worked--systematically routing out the enemy throughout the country, while training and aiding the South Vietnamese to take on more of the combat load.

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