"Deeply Dug In" by R. L. Barth
Interesting book - short poems.

Thirty-five years ago R. L. Barth was a Marine patrol leader in the
First Reconnaissance Battalion in Vietnam. Today he is a poet's poet who
articulates the harsh realities and ironies of war in the style of the
great classical satirists. Barth writes about Vietnam, but his soldier's
take on the war is startlingly applicable to the conflicts of the
twenty-first century or to any war that happens to be going on.

"I never once saw dying eyes / That were not stunned or shattered by
surprise." That is just as it is, never mind all the dulce et decorum
exhortations of politicians, who today as always clamor to kill us all.
In this slender but rich collection of poems, R. L. Barth proves himself
a worthy descendant of Martial and Archilochus, lobbing grenades at what
Kenneth Rexroth called the Social Lie, capturing moments of grace and
disgrace in combat, and locating the Homeric nobility of ordinary
soldiers under fire. As he does, he honors the language. Read him, eyes
wide open, and understand."--Gregory McNamee, editor of The Desert Reader

"An inventive and resourceful poet. . . . very discreet . . . his lines
are built out of images balanced by concepts, each giving weight to the
other. . . . Poet or not, Barth was in charge of an elite fighting group
that stayed out longer than other units. . . . Many died, including a
friend of Barth's memorialized in 'Elegy for a Dead Friend,' one of the
best war poems in English."--Thomas D'Evelyn, Christian Science Monitor

https://www.amazon.com/Deeply-Mary-Burritt-Christiansen-Poetry/dp/0826331823

Many Viet Nam War veterans write poetry, but very few write with the
power, passion and skill of R. L. Barth. A trained classicist, Barth is
at his best when writing in the epigrammatic tradition of Simonides,
Martial, and Pope, although this collection does include a few somewhat
longer narrative and lyric poems. Barth writes with savage indignation,
acute wit, and wonderful control of language. He gives no quarter to
chickenhawks who send other people to war and he refuses to accept or
profit from our comfortable myths about war. There is little sentiment
here, and no self pity. Most veteran poetry will be forgotten, but
surely not Barth's. These poems are not about Viet Nam, but about war,
human nature, and society.

This site gives the ability to read a fair number of the poems:

https://books.google.com/books?id=wnZL_QcrziIC&pg=PA15&source=gbs_toc_r&cad=3#v=onepage&q&f=false

Like #6. Initial Confusion
A sergeant barked, "Your ass is Uncle's!" though
It wasn't clear if he meant Sam or Ho.

#14. What is our Life?
A rigged game with the odds not even scanty.
Just play the joker and don't up the ante.

#19. Epitaph
Tell them quite simply that we died
Thirsty, betrayed, and terrified.