The French attacked on a plan which was soon to become the regular method of puncturing the German lines all along the Western front. Let me give you some account of this plan--the only possible method of capturing the strongly fortified trenches of the enemy without a terrible loss of life. As you know, the first obstacle to an attack on a line of trenches consists of the barbed wire entanglements which are fixed up in front of them. The attackers are held up by the network of wire, and can be shot down in droves by rifles and machine guns. Then the trench itself has a strong parapet, with loopholes through which the defenders fire on the attackers. For infantry to charge the barbed wire while the parapets are held by an enemy is to court almost certain disaster. Study the diagram on page 67. AB is a line of trenches to be attacked, and X is a line of big guns. These guns throw a shower of high explosive shells on to the enemy's trenches. So terrible is the explosion that the barbed wire is blown into a thousand fragments, the parapets are beaten down, the whole trench is utterly wrecked, and the defenders are either killed or wounded, or so stunned by the violence of the bombardment that they cannot make much resistance. When this is done, the gunners lift their sights and lengthen their fuses, and behind the trench create at C a curtain of fire through which no enemy reinforcements can possibly pass. Then the attacking infantry rush forward and occupy the wrecked trench. They work away with their entrenching tools, make a new parapet facing the enemy's second line of trenches, and prepare to beat off counter-attacks. Trenches are thus captured by gun fire alone. You can easily understand that advances made in this way will be slow. Telephone wires have to be laid, ranges calculated, and a thousand details arranged before an assault can be made. [Illustration] If such an attack is to succeed, two things are necessary. In the first place, the attackers must have many big guns and an almost unlimited supply of ammunition for them; and secondly, they must bring up their guns at X unknown to the enemy, and take him by surprise. If he is able to see the big guns being brought up, he will fire on them before they can be concealed. He will also mass his own guns, and the affair will become an artillery duel on a large scale. Happily, in Champagne the French were able to mass their guns secretly. Their airmen had become so expert that they were able to beat back all the German aircraft that attempted to scout over their lines, while at the same time they could fly over the German lines without much hindrance. Here is a description of such an attack as seen by a British observer in Champagne:--