Zeppelin LZ 21

Zeppelin LZ 21, with the military designation Z VI, was the 21st airship built by Count Zeppelin and the ninth Zeppelin used by the Imperial German Army. It made its first flight on 10 November 1913. At the outbreak of the First World War it was stationed at Cologne, and during the Battle of Liège it carried out a night bombing raid on the forts around the city on 6 August 1914, carrying 200 kilograms of explosives. The raid is believed to have been the first aerial bombing attack of the war and killed nine civilians. Hit by shrapnel from anti-aircraft fire, the airship lost much of its gas and made an emergency landing in a forest near Bonn, where it was dismantled on site because of the damage.