From Kanopy:

French Army Captain Antares Bonassieu and his squad are assigned to monitor a remote valley of Wakhan, Afghanistan on the border of Pakistan. Negotiating control of the region between local shepherds and possible Taliban sympathizers grows more and more tenuous for them as men from all sides start mysteriously disappearing. Unable to explain this eerie phenomenon, the soldiers find themselves embroiled in an existential nightmare, desperate for their own safety.

From Kanopy you can stream this 105 minute complete French film with English subtitles.

Films involving some paranormal occurrence are often second-rate. But in this military themed film, there is nothing cheesy about the paranormal disappearances of both soldiers and Afghans.  What is palpable throughout is the increasingly desperate frustration of Captain Bonassieu (played by Jérémie Renier) and his men to explain what is happening.  Even if the solution suggested to the soldiers by a young Afghan shepherd seems implausible, it hardly matters to the story.  More important and really central to the drama is the mounting tension, its psychological effect on the troops, and how to explain the disappearances to their loved ones back home. Bonassieu’s final act of self-sacrifice is clever and unexpected.

Slow moving and clearly a genre that may not appeal to everyone, this film presents, nonetheless, a rather unique and possibly moving plot.