The Germans launched a full frontal offensive on Osowiec Fortress at the beginning of July; the attack included 14 battalions of infantry, one battalion of sappers, 24–30 heavy siege guns, and 30 batteries of artillery equipped with poison gases led by Field MarshalPaul von Hindenburg. Russian defenses were manned by 500 soldiers of the 226th Infantry Regiment Zemlyansky, and 400 militia. The Germans waited until 4 a.m. on 6 August for favorable wind conditions, when the attack opened with regularartillery bombardment combined with chlorine gas. "The gas caused the grass to turn black and leaves to turn yellow, and the dead birds, frogs and other animals and insects were lying everywhere. Terrain looked like Hell." The Russians either had no gas masks, or had poorly made ones, and most soldiers used their undershirts as masks, with many soaking them in water or urine. Sub-Lieutenant Vladimir Kotlinsky, the highest ranking Russian soldier to survive the initial attack, rallied the other surviving soldiers, and they elected to charge the advancing German lines. Over twelve battalions of the 11th Landwehr Division, making up more than 7000 men, advanced after the bombardment expecting little resistance. They were met at the first defense line by a counter-charge made up of the surviving soldiers of the 13th Company of the 226th Infantry Regiment. The Germans became panicked by the appearance of the Russians, who were coughing up blood and bits of their own lungs, as the hydrochloric acid formed by the mix of the chlorine gas and the moisture in their lungs had begun to dissolve their flesh. The Germans retreated, running so fast they got caught up in their own c-wire traps. The five remaining Russian guns subsequently opened fire on the fleeing Germans. Kotlinsky died later that evening. The Russians did not hold the area for much longer. The Germans threatened to encircle the fortress with the capture of Kovno and Novogeorgiesk. The Russians demolished much of the fortress and withdrew on August 18th.
Legacy
Swedish metal band Sabaton released a song about the battle, titled "The Attack of the Dead Men", on their 2019 album The Great War. Russian metal bandAria also released a song inspired by the battle, titled Атака Мертвецов, on their 2014 album Через все времена.