Alien Invasion S.U.M.1 (2017, dir. Christian Pasquariello)

A lone watchtower soldier begins to doubt his solitary 100-day mission. Low-budget but generally well-sustained single-location SF thriller, owing something to films like Moon and The Village.

War for the Planet of the Apes (2017, dir. Matt Reeves)

Caesar comes up against a military leader determined to wipe apes from the planet. Downbeat but impressive third and final part of the trilogy; a more introspective movie than its predecessors but stirring nevertheless.

Another opinion? Here’s Lemonsquirtle’s review.

Green Zone (2010, dir. Paul Greengrass)

An idealistic soldier discovers the truth about WMDs in 2003 Iraq. Sleek action-led thriller which dramatises a key event in recent world history. Simplistic in its approach but undeniably thrilling, with several great sequences.

The Cloverfield Paradox (2018, dir. Julius Onah)

A space station tasked with saving the Earth from energy crisis is transported to a parallel dimension. Good-looking, well-cast, but dumb-as-rocks sidequel to Cloverfield / 10 Cloverfield Lane that steals indiscriminately (Gravity to Evil Dead II) but can’t settle in terms of tone or logic.

Platoon (1986, dir. Oliver Stone)

An idealistic volunteer learns the brutality of war the hard way. Simplistic but undeniably effective Vietnam War morality play, with a soldier’s-eye perspective throughout; an excellent ensemble cast supports the drama.