The Huns were, with the exception of the Persians who had vainly attacked the Greek States at an earlier period, the first successful Asiatic invaders of Europe. For a full century they ravaged the Empire, and the Balkan Peninsula felt the chief force of their barbarian rage. By the fifth century the waves of the Hun invasions had died away, leaving distinct traces of the Hunnish race in the Balkans. The Gepidae, the Lombards, and later the Hungarians and the Tartars then took up the task of ravaging the unhappy land which as the chief seat of power of the Greek Empire found itself the first objective of every invader because of that dignity and yet but poorly protected by that power. Constantinople was never taken by these barbarians, but at some periods little else than its walls stood secure against their ravages.

Meanwhile the first Saracens had appeared in the Peninsula, curiously enough not as invaders nor as enemies, but as mercenary soldiers in the army of the Greek Empire fighting against the Goths. To a Gothic chronicler we are again indebted for a vivid picture of these Saracens, "riding almost naked into battle, their long black hair streaming in the wind, wont to spring with a melancholy howl upon their chosen victim in battle and to suck his life-blood, biting at his throat." Perhaps the Gothic war correspondent of the day studied picturesqueness more than accuracy, like some of his modern successors. But, without a doubt, the first contact with Asiatics, whether Huns or Saracens, gave to the European peoples a horror and a terror which had never been inspired by their battles among themselves—battles by no means bloodless or merciful. As the Asiatic waves of invasion later developed in strength the unhappy Balkan Peninsula was doomed to feel their full force as they poured across the Bosphorus from Asia Minor, and across the Danube from the north-eastern Asiatic steppes.

It would be vain to attempt to chronicle even in the barest outline all the horrors inflicted upon the Balkans from the date of the first invasion of the Huns in the fourth century to the first invasion of the Turks in the fourteenth century. To say that those ten centuries were filled with bloodshed suffices. But they also saw the development of the Balkan nationalities of to-day, and cannot therefore be passed over without some attention. Let us then glance at each Balkan nation during that period.

Roumania, inhabited by the people of the old Roman-Dacian colony, stood full in the way of the Northern invasions of Goths, of Huns, of Hungarians, of Tartars. It was almost submerged. But in the thirteenth century the country benefited by the coming of Teutonic and Norman knights. The two kingdoms or principalities of Moldavia and Wallachia (which, combined, make up modern Roumania) were founded in this century.

Bulgaria.—In the seventh century Slavs had begun to settle in Bulgaria. The Bulgars or Volgars followed. They were akin to the Tartars and the Turks. Together Slavs and Bulgars formed the Bulgarian national type and founded a very robust nation which was almost constantly at war with the Greek Empire (with its capital at Constantinople). At times Bulgaria seriously threatened Constantinople and the Greek Empire. A boastful inscription in the Church of the Forty Martyrs at Tirnovo, the ancient capital of Bulgaria, records:

In the year 1230, I, John Asên, Czar and Autocrat of the Bulgarians, obedient to God in Christ, son of the old Asên, have built this most worthy church from its foundations, and completely decked it with paintings in honour of the Forty holy Martyrs, by whose help, in the 12th year of my reign, when the Church had just been painted, I set out to Roumania to the war and smote the Greek army and took captive the Czar Theodore Komnenus with all his nobles. And all lands have I conquered from Adrianople to Durazzo, the Greek, the Albanian, and the Serbian land. Only the towns round Constantinople and that city itself did the Franks hold; but these too bowed themselves beneath the hand of my sovereignty, for they had no other Czar but me, and prolonged their days according to my will, as God had so ordained. For without him no word or work is accomplished. To him be honour for ever. Amen.

The wars were carried on under conditions of mutual ferocity which still rule in Bulgarian-Grecian conflicts. An incident of one campaign was that the Greek Emperor, Basil, the Bulgar-slayer, having captured a Bulgarian army, had the eyes torn out of all the men and sent them home blinded, leaving, however, one eye to every centurion, so that the poor mutilated wretches might have guides. In the early part of the fourteenth century a Bulgarian Czar, Michael, almost captured Constantinople. He formed a league with the Roumanians and the Greeks against the Serbs, who were at the time promising to become the paramount power of the peninsula. But Czar Michael was defeated by the Serbs and Bulgaria became dependent upon Serbia, which was the position of affairs at the time of the first serious Turkish invasion of the Balkan Peninsula.

Serbia.—Invading tribes of Don Cossacks began to come in great numbers to the Balkan Peninsula in the sixth century. In the seventh century they were encouraged by the Greek Empire to settle in Serbia, on condition of paying tribute to Constantinople. They set up a kind of aristocratic republic of a Slav type. In the ninth century they began to fight with the neighbouring and kindred Bulgarians. Early in the tenth century (a.d. 917) the Bulgarians almost effaced Serbia from the map; but the Serbs recovered after half a century, only to come shortly afterwards under the sway of the Greeks. In the eleventh century the Serbians held a very strong position and were able to harass the Greek Empire at Constantinople. They entered into friendly relations with the Pope of Rome, and for some time contemplated following the Roman rather than the Eastern Church. In the twelfth century King Stephen of Serbia was a valued ally of the Greek Empire against the Venetians. He established Serbia as a European "Power," and the Emperor Frederick Barbarossa visited his court at Belgrade. This king was the first of a succession of able and brave monarchs, and Serbia enjoyed a period of stable prosperity and power unusually lengthy for the Balkans. Except for the strife between the Eastern and Roman Catholic Churches for supremacy in Serbia, the nation was at peace within her own borders, and enjoyed not only a military but an economic predominance in the Balkans. Mining and handicrafts were developed, education encouraged, and the national organisation reached fully to the average standard of European civilisation at the time. By 1275 the Serbs were the chief power in the Balkans. They defeated the Greeks, marched right down to the Aegean and reached the famous monastery of Mount Athos, to which the first King Stephen (Nemanya) had retired in 1195 when he abdicated.

In 1303 the Serbians forgot their quarrel with the Greeks and helped them against the Turks, undertaking an invasion of Asia Minor. In 1315 they again saved the Greek Empire from the Turks. When in 1336 Stephen Dushan, the greatest of Serbian kings, who has been compared to Napoleon because of his military genius and capacity for statesmanship, came to the throne, Bulgaria was under the suzerainty of Serbia, and the Serb monarch ruled over all that area comprised within the boundaries of Bulgaria, Serbia, Albania, Montenegro, and Greece by the recent treaty of Bucharest (1913). King Stephen Dushan was not only a great military leader, he was also a law-maker and a patron of learning. His death on December 13, 1356, at the Gates of Constantinople—he is said to have been poisoned—opened the way for the Turkish occupation of the Balkan Peninsula. That occupation was made possible in the first instance by the mutual jealousies of the Christian peoples of the Balkans. It was kept in existence for centuries by the same weaknesses arising from jealousy. In 1912 it was swept away in a month because in a spasm of common sense the Balkan Christian peoples had united. In 1913 it was in part restored because internecine strife had broken out again among the Balkan natives recently allied. It will probably continue until the lesson of unity is learned again.