Given the home and abroad posture of that day, the north did not dare to attack the south across the DMZ, so it opened a secret trail through Lao and Cambodia to send military material and army.

• 鉴于当时的国内外形势，北越尚不敢公开越过非军事区进攻南越，所以秘密开辟了胡志明小道，借道老挝和柬埔寨把大量的军队和物质渗透到南方。