In the last week of February, 1915, it had been learned by General Joffre that General von Falkenhayn of the German forces had withdrawn from Neuve Chapelle, and the section north of La Bassee six batteries of field artillery, six battalions of the Prussian Guard, and two heavy batteries of the Prussian Guard. These had been withdrawn for the purpose of checking the supposed French advance at Perthes, as already narrated. Hence it was known that the English, in command of Sir Douglas Haig, at Neuve Chapelle, were opposed by a thin line of German troops who were making a demonstration of force for the purpose of concealing the weakness of their line. [Illustration: The Western Battle Line, January 1, 1915.] The British officers in the region of Neuve Chapelle received complete instructions on March 8, 1915, in regard to an offensive which they were to start on the 10th. These instructions were supplemental to a communication which had been sent on February 19 by the British commander in chief to Sir Douglas Haig, the commander of the First Army. Neuve Chapelle was to be the immediate objective of the prospective engagement. This place is about four miles north of La Bassee at the junction of main roads, one leading southward to La Bassee, and another from Bethune on the west to Armentieres on the northeast. It is about eleven miles west of Lille. These roads formed an irregular diamond-shaped figure with the village at the apex of the eastern sides, along which the German troops were stationed. The British held the western sides of this figure. The land in this part of France is marshy and crossed by dykes; but, to the eastward, the ground rises slowly to a ridge, on the western border of which are two spurs. Aubers is at the apex of one; and Illies at the apex of the other. Both of these villages were held by the Germans. The ridge extends northeast, beyond the junction of the spurs, from Fournes to within two miles southwest of Lille. Along the ridge is the road to Lille, Roubaix, and Tourcoing, all of which are among the chief manufacturing towns of France. The occupation of the ridge was a necessary step to the taking of Lille; and Neuve Chapelle was at the gateway to the ridge. If the Allies could take Lille they would then be in a position to move against their enemy between that point and the sea.