A new unit had come into line on April 13. This was the Thirty-third Division under General Pinney. It was at once thrust in to fill the gap in front of Bailleul, where it found itself involved from that date onwards in most desperate fighting, in which it was associated with the Thirty-first Division. The narrative of the services and trials, both of them very great, which were rendered and endured by these divisions may be best told in consecutive form, as a too strict adhesion to the order of dates produces an {263} effect which makes it difficult to follow the actual happenings. We shall first consider the operations at Hazebrouck and Meteren, where these two divisions and the First Australian Division were chiefly concerned, and we shall afterwards return to the north and follow the fortunes of the Nineteenth, Twenty-fifth, Forty-ninth, Thirty-fourth, and other divisions which were holding the northern curve. [Sidenote: Central Area. April 12.] The line was very weak on April 12 in front of central Hazebrouck, and yet it was absolutely vital that this important railway junction should not fall into German hands. The need was pressing and desperate, for the German attack was furious and unremitting, while the British line was so thin, and composed of such weary units, that it seemed impossible that it could hold. The exhausted remains of the Fiftieth Division, who had been at it continually ever since the breaking of the Portuguese front, were hardly capable now of covering or defending any serious front. Yet if the ground could be held, the First Australian Division, brought hurriedly back from the Somme and in the act of detraining, would be in the line within twenty-four hours. There have been few moments more heavy with fate during the whole of the campaign. Everything depended for the moment upon Pinney's Thirty-third Division, upon the worn remnants of the Twenty-ninth Division, upon the 92nd and 93rd Brigades, and upon the 4th Guards Brigade of the Thirty-first Division who were brought up from Pradelles, and thrown hurriedly across the path of the advancing Germans.