Zombie movies like World War Z and Army of the Dead are no doubt terrifyingly interesting— hordes of the undead chasing the living while their bodies rot away. Bonus if they’re mindlessly chanting, “Brainssss. Brainssss.” It’s pretty wild. During World War I, there was a battle known as the “The Attack of the Dead Men,” which could be the closest zombie experience that humanity had.

The story didn’t happen in some post-apocalyptic setting, kind of. It was during the battle at the Osowiec Fortress in 1915 between the Germans and the Russians.

The Era of Poison Gas

If you haven’t heard, World War I was an age of poison gas. Different vapors of death were invented and utilized to attack enemy troops: phosgene gas, mustard gas, chlorine gas (which US troops thought could be combatted by wearing masks with urine). They were all nasty in their own destructive ways.

Poisonous Gas in WWI. Lraymond21CC BY-SA 4.0, via Wikimedia Commons

The Gas Attack

So the Russians were protecting the Osowiec Fortress when the Germans decided it was time to launch a full-frontal offense by using 14 battalions of infantry, including sappers, siege guns, and some 30 batteries of artillery using shells filled with chlorine gas. If you haven’t heard, exposure to chlorine gas could cause fluids in the lungs, causing the victims to drown from the inside. The Germans made sure the wind was to their advantage to make sure that the gas would reach the adversaries, you know, instead of backfiring if the wind changed direction. Luckily for them, the god of the wind was in favor of them.