Ww1 knowledge required Tw: war (obviously), descriptive details. Do not comment if you are sensitive to these topics.

*During the Battle of Osowiec Fortress in 1915, German Field Marshal Paul Von Hindenburg ordered the bombardment of the fortress with an artillery barrage of chlorine gas to eradicate the 900 Russian defenders. After the bombardment 7,000 German soldiers advanced upon the fortress expecting little to no resistance when 100 disfigured Russians... and you've won... or so you thought.*

*casually sipping jager while mowing down the zombies from COD WWII*