A third shock was in store. Ever since the spring of 1916 Bulgaria had occupied the Drama-Serres-Kavala districts of Greek Macedonia. In 1916, Greece was clinging to an ambiguous neutrality, but a year later the Entente powers deposed King Constantine, and Greece ranged herself squarely on the Allied side, with a declaration of war against Bulgaria as one of the first consequences. Thereupon Bulgaria urged Germany to allow her definitely to annex the occupied districts and to promise her Saloniki when victory should crown the Teuton-Bulgar arms. But here again Bulgaria discovered that Germany had other fish to fry. Ex-King Constantine and the Greek royalists might yet be very useful to Berlin. Therefore they must not be alienated by giving Bulgaria territories which would render every Greek an irreconcilable foe to Mitteleuropa. Also Saloniki, the great AEgean outlet of central Europe was far too valuable a prize to be committed exclusively to Bulgarian hands. But Saloniki could be reached from central Europe only across Macedonia. Therefore in the final Balkan settlement there must be reserves regarding Bulgaria's control of the Macedonian railroad system. For that matter, this might have to be applied to Bulgaria's own railroad system, since it was the trunk-line from central Europe to the East. [Sidenote: German interests first.] So reasoned the suave German diplomats. The effect upon Bulgarian sensibilities can be imagined. How far removed was this drab reality from roseate dreams of imperial Bulgaria dominating the entire Balkans and treating with Teutonic partners as a respected equal! The grim truth was this: Bulgaria's promised gains were being whittled away according to the shifting exigencies of German policy. Was anything certain for the future? No. Because German interests came first, and the junior colleagues must "do their part." Here once more appeared the Nemesis of Prussian _Realpolitik_, that sinister heresy the crowning demerit of which is that it is not even "real," since it reposes on short-sighted egoism and disregards those moral "imponderables," good faith, fair-dealing, etc., which weigh most heavily in the end. Having turned the neutral world into enemies, _Realpolitik_ was now ready to turn Germany's allies into neutrals. [Sidenote: Bulgaria is discontented.] [Sidenote: Bulgaria suffers also from previous wars.]