The half year ending with February 1, 1917, was a period of almost continuous activity before Saloniki, in sharp contrast to the previous six months, which had been quite uneventful. Yet that interval between the conquest of Serbia by the Austro-German and Bulgarian troops and the renewal of fighting, beginning in August, 1916, were months of furious preparation by General Sarrail and his colleagues. From what was little more than a precarious footing in Saloniki itself they had established a firm base protected by a wide circle of intrenchments, while their forces had been augmented to something not far from three-quarters of a million men under arms and a huge supply of ordnance and munitions. From a mere expedition to keep a back door open for the defeated Serbians, Sarrail's army had developed into what was obviously going to be a gigantic campaign against the rear of the Central Powers, an attempt to enter Austria through a back window. Such, at least, was the supposition of military critics the world over. Incidentally the presence of so large a force of the Allies in Macedonia served various other purposes. Viewing the situation with a retrospective eye, at the present moment, there can be no doubt that Greece would by now have thrown her lot in with the Central Powers had it not been for her fear of Sarrail's forces. Also, the Teutons and the Bulgarians were compelled to devote a large force to holding a front opposite Sarrail, and so weaken their other fronts. And finally, without Sarrail in Saloniki, Rumania would never have decided to join hands with the Allies, certainly not so early as she did. To be sure, Rumania was defeated, but her defeat must have cost the Central Powers grave losses which may eventually prove to have turned the tide in favor of the Allies.