Here are some secondary selections that other people should pick.

Slow Burn by De Forest

Silence Was a Weapon by Herrington

War Comes to Long An by Race

The entire body of work by Bing West.

What may be a surprise selection to some but it was actually Robert Thompson who came up with this one.-any of the Jim Corbett books on hunting man-eaters. The reason for this one is it gives the best picture of what living under the threat of terror coming for you in the night is like.

War Comes to Garmser by Malkasian (I stole this from David).

The Philippine Insurrection books by Brian Linn, especially accounts of the intel work against the shadow governments done by Lt. William T. Johnston.

Small Wars Manual by USMC.