Ray Mendoza and Alex Garland’s “Warfare” is more defined by what it isn’t than what it is.

In their Iraq War-set film, there’s never any description of a wider strategy. There are no back stories to the American Navy SEALs we follow on an unspectacular mission. There’s not a short monologue about mom’s cooking back home, let alone a speculative word about life after the war. There’s not even a dramatic close-up to be had.

“Warfare” aspires to be, simply, just that. We are effectively embedded in a platoon on what seems to be a minor mission in Iraq in 2006. Walking in two single-file lines down a Ramadi street at night, one soldier says “I like this house.” Under the cover of darkness, they rush inside the apartment building to set up their position while keeping the family inside quiet. In the morning, their sniper, laid out on a raised bed, sweats while looking out on an increasingly anxious scene. His rifle’s crosshairs drift through the street scenes outside, as suspected jihadists mobilize around them.

War-movie cliches have been rigorously rooted out of “Warfare,” a terse and chillingly brutal immersion in a moment of the Iraq War. Clouds of IED smoke and cries of agony fill Garland and Mendoza’s film, with little but the faces of the SEALs to ground a nearly real-time, based-on-a-true-story dramatization. Few words are spoken outside the intense patter of official Navy jargon. When the mission comes to its hectic conclusion, the only utterance left hanging in the clouded air is the unanswered, blood- curdling shriek of a woman watching the men leave her bombed-out home: “Why?”

A year after “Civil War,” a movie predicated on bringing the horror of war home to American soil, Garland has returned with a film even more designed to implode fanciful ideas of war by bringing it acutely close. Mendoza, an Iraq War veteran who served as a consultant on “Civil War,” co-writes and co-directs “Warfare” from his experience in Iraq. The movie is introduced as based on the memories of the troops involved, and “Warfare” gives little reason to quibble with its ultra verisimilitude.

If a mode of American war movie leans toward showing the follies of war on the ground, the soldiers of “Warfare” — while not immune to a little imitation of the video for Eric Prydz’s “Call on Me” — are supremely precise. When things go haywire here, it’s not because the SEALs aren’t alert or are haphazard in their regard for the lives around them.

Among them are sniper Elliott (Cosmo Jarvis), Eric (Will Poulter), Tommy (Kit Connor), Sam (Joseph Quinn) and Ray (D’Pharaoh Woon-A-Tai). We never learn anything about any of them except their fidelity to their comrades and their willingness to do what’s necessary when even the heaviest fire is raining down on them.

In this forensic portrait of war, the only way to not get what’s happening on the ground is to be too far from it. François Truffaut famously said there’s no such thing as an anti-war film because movies inherently glamorize war. “Warfare,” though, is intent on challenging that adage.

MPA rating: R (for intense war violence, bloody/grisly images and language throughout)

Running time: 1:47

How to watch: In theaters