The siege of LZ Kate - Arthur G Sharp

At the end of October 1969, 5,000 North Vietnamese Army regulars surrounded a force of 150 American soldiers and their South Vietnamese allies at a firebase in a far-flung corner of Vietnam.
The situation was desperate and, despite initial attempts to resupply the base, soon became untenable.
It was fight on and meet near-certain death or capture--or attempt an escape.
Led by a pair of no-nonsense Special Forces soldiers, the Americans and their allies chose escape, which was a harrowing five-hour experience conducted across two and a half miles of enemy-infested ground in the dark of night.
This story of against-all-odds bravery is also a cautionary tale about the perils of Richard Nixon's policy of Vietnamization, which produced the precarious situation at Fire Support Base Kate.