zombies

The Attack of the Dead Men (AKA The Battle of Osowiec Fortress)

Field Marshel Von Hindenburg shelled the fort for days, eventually, he brought in gas arty and fired it at the fort, knowing the Russians had no Gas Masks. What came out of the fort were zombie like men, they were coughing up their lungs (Literally). The sight caused the Germans to get the hell out of dodge.