The idea of such a balloon took a strong hold upon the imagination of the German army staff long before the Great War, and Count Ferdinand Zeppelin gave the best years of his life to its development. From the beginning he met with great difficulties. His first ships proved mechanical failures, and after these difficulties were overcome he met with a series of accidents which almost put an end to his efforts. By popular subscription, and by government support, he was able to continue, and when the war began Germany had thirty-five dirigible balloons of the Zeppelin and other types, many of them as much as 490 feet long. The Zeppelin balloon, called the Zeppelin from the name of its inventor, was practically a vast ship, capable of carrying a load of about fifteen thousand pounds. It would carry a crew of twenty men or more, fuel for the engines, provisions, a wireless installation, and armament with ammunition. For a journey of twenty hours such a vessel would need at least seven thousand pounds of fuel. It would probably be able to carry about two tons of explosives. These Zeppelins could travel great distances. Before the war one of them flew from Lake Constance to Berlin, a continuous flight of about one thousand miles, in thirty-one hours. These great aerial warships were given a thorough trial by the Germans. They disliked to admit that they had made a costly mistake in adding them to their armament. It soon turned out, however, that the Zeppelins were practically useless in battle. Whatever they could do, either for scouting purposes or in dropping explosives behind the enemy’s lines, could be better done by the airplane. The French and the English, who before the war had decided that the airplane was the more important weapon, were right. But the Germans did not give up their costly toy so easily, and they determined to use it in the bombardment of cities and districts situated far away from the German line, in dropping bombs, not upon fortifications, or armed camps where they might meet with resistance, but upon peaceful non-belligerents in the streets of great unfortified cities. It was their policy of frightfulness once again. And once again they had made a mistake. The varied expeditions of the Zeppelin airships sent from Germany to bombard Paris, or to cross the Channel and, after dropping bombs on seaside resorts to wander over the city of London in the hope of spreading destruction there, did little real damage and their net effects, from a military point of view, were practically nil.