I remember seeing this horror film around 5 years ago, it was in colour, it began with a war scene, with artillery shooting into no man’s land and a shell hitting something in no man’s land causing a vault or hole to open releasing a horde of zombie like creatures that were fast and have a spike or blade instead of one arm, they drag dead people back to the hole where they are then turned into theses creatures by a machine, a scene following the opening of the hole is when a group of attacking soldiers reach the enemy trenches and discover that the enemy had already been killed and by cuts not by bullets then the soldiers are killed, this is all I can remember of the film and that it was in English.