In October, 1967 the 1st PAVN Division with the 32nd and 66th PAVN regiments were operating in the Central Highlands and had drawn the 173rd Brigade and the 1st Brigade, 4th ID into a fierce fight in the Mountains by the end of the month. In November, the 10th PAVN division consisting of the 174th and 175th PAVN Regiments reinforced the 1st Division. The fight over Dak To lasted most of the month. It was some of the fiercest fighting between North Vietnamese and US forces.

Coincidentally, I watched a documentary this afternoon on the battle of Dak To on the Military History channel. 

[center][youtube]https://www.youtube.com/watch?v=auxBZNJt5CI[/youtube][/center]

[center][youtube]https://www.youtube.com/watch?v=KCoaVvPm_H4[/youtube][/center]