Greeks were already in possession of this important city and seaport, as well as of the whole of southern Macedonia. The Serbs were in possession of central and northern Macedonia, including Monastir and Okhrida, which they had at great sacrifices conquered from the Turks. It had been agreed that Bulgaria, as its share of the spoils, should have all central Macedonia, with Monastir and Okhrida, although on ethnical grounds the Bulgarians have only very slightly better claim to the country and towns west of the Vardar than any of the other Balkan nationalities. But at the time that the agreement had been concluded it had been calculated in Greece and Serbia that Albania, far from being made independent, would be divided between them, and that Serbia, assured of a strip of coast on the Adriatic, would have no interest in the control of the river Vardar and of the railway which follows its course connecting the interior of Serbia with the port of Salonika. Greece and Serbia had no ground whatever for quarrel and no cause for mutual distrust, and they were determined, for political and commercial reasons, to have a considerable extent of frontier from west to east in common. The creation of an independent Albania completely altered the situation. If Bulgaria should obtain central Macedonia and thus secure a frontier from north to south in common with the newly-formed state of Albania, then Greece would be at the mercy of its hereditary enemies the Bulgars and Arnauts (Albanians) as it had previously been at the mercy of the Turks, while Serbia would have two frontiers between itself and the sea instead of one, as before, and its complete economic strangulation would be rendered inevitable and rapid. Bulgaria for its own part naturally refused to waive its claim to central Macedonia, well knowing that the master of the Vardar valley is master of the Balkan peninsula. The first repercussion of the ephemeral treaty of London of May 30, 1913, which created Albania and shut out Serbia from the Adriatic, was, therefore, as the diplomacy of the Germanic powers had all along intended it should be, the beginning of a feud between Greece and Serbia on the one hand, and Bulgaria on the other, the disruption of the Balkan League and the salvation, for the ultimate benefit of Germany, of what was left of Turkey in Europe.