War of the Dead

This is a movie set during WWII and involves Captain Stone and a platoon of American and Finnish soldiers on a mission to find a bunker held by the Germans. On the way there they come under fire and at the same time run in to some German soldiers that seem to be "undead". How is this possible? Their platoon is almost completely killed off apart from a few of them, including Capt. Stone. They move on and run in to another survivor, a Russian soldier. They all try to survive and end up at the bunker they were meant to take out. But once inside they find out just how the German soldiers became the "undead".