1965
This is not a major engagement but it was a significant event. Essentially ARVN paratroopers jumped in the Ben cat area. It was the first major parachute assault of the war by the South Vietnamese. However, they failed to make contact with the enemy although they did clear Route 13.
They were also accompanied by US advisors and I am going to assume that they had US air support.
You can look at it how you like but I have put in some Vietcong in case you want to replicate some resistance, or you can assume they evade.
There are a few objective hexes to reflect points along the road that need securing.
see Vietnam War Almanac, James H Willbanks, p138