Need Help Finding a Book Title

[NickM]

Gang:

This is NOT an aviation book (well if you consider choppers, it MIGHT be);


I'm looking for a non fiction book title: I had read it YEARS ago; The author was a US Army Captain assigned to a 'hard luck' infantry company in the 1st Air Car, pre-Tet Offensive, stationed somewhere in the mountains around Bong Son. The author also recounted bits of his earlier tour advising the ARVN. Anyway, he does a great job leading his company to payback in Bong Son before being transferred up north near Khe Sanh to oppose the NVA up there. He ended the book getting a chunk of his tibia shot out of his leg (the book interweaves his unpleasant stay in hospital);
The ONLY thing I recall from the title was the word "SIx" being in it (I guess part of his callsign) and possibly remembering the author made it to his Colonelcy before recently passing away in his eighties
Does it ring any bells with anybody?

Thanks ahead of time