Death Trench [AKA Trench 11] (2017, dir. Leo Scherman)

In the last moments of WWI, a team go behind German lines to investigate a mysterious compound where chemical weapons may be being developed. Okay addition to the period military zombie subgenre: the 1918 setting is a bonus. The usual infighting, mad doctor, odd alliances plus marauding infested shenanigans ensue.