In the fatal quarrel between Bulgaria and Serbia which caused the disruption of the Balkan League, led to the tragic second Balkan war of July 1913, and naturally left behind the bitterest feelings, it is difficult to apportion the blame. Both Serbia and Bulgaria were undoubtedly at fault in the choice of the methods by which they sought to adjust their difference, but the real guilt is to be found neither in Sofia nor in Belgrade, but in Vicuna and Budapest. The Balkan League barred the way of the Germanic Powers to the East; its disruption weakened Bulgaria and again placed Serbia at the mercy of the Dual Monarchy. After these trying and unremunerative experiences it is not astonishing that the Bulgarian people and its ambitious ruler should have retired to the remote interior of their shell. _Explanation of Serbian orthography_ c = ts č = ch (as in _church_) ć = ” ” ” but softer š = sh ž = zh (as z in _azure_) gj = g (as in _George_) j = y [Illustration: THE BALKAN PENINSULA] SERBIA 14 _The Serbs under Foreign Supremacy_, 650–1168 The manner of the arrival of the Slavs in the Balkan peninsula, of that of the Bulgars, and of the formation of the Bulgarian nationality has already been described (cf. p. 26). The installation of the Slavs in the lands between the Danube, the Aegean, and the Adriatic was completed by about A.D. 650. In the second half of the seventh century the Bulgars settled themselves in the eastern half of the peninsula and became absorbed by the Slavs there, and from that time the nationality of the Slavs in the western half began to be more clearly defined. These latter, split up into a number of tribes, gradually grouped themselves into three main divisions: Serbs (or Serbians), Croats (or Croatians), and Slovenes. The Serbs, much the most numerous of the three, occupied roughly the modern kingdom of Serbia (including Old Serbia and northern Macedonia), Montenegro, and most of Bosnia, Hercegovina, and Dalmatia; the Croats occupied the more western parts of these last three territories and Croatia; the Slovenes occupied the modern Carniola and southern Carinthia. Needless to say, none of these geographical designations existed in those days except Dalmatia, on the coast of which the Latin influence and nomenclature maintained itself. The Slovenes, whose language is closely akin to but not identical with Serbian (or Croatian), even to-day only number one and a half million, and do not enter into this narrative, as they have never played any political rôle in the Balkan peninsula.