A new detachment of Bulgarians in the seventh century sec a appeared and took possession of the delta of the tin of Buiga- Danube, pushing on as far as Varna. They came from Black Bulgaria, a half-civilized state on the Volga, which disappeared in the thirteenth century during the Mongol invasion. They were probably a Uralian people allied to the Finns.
On their re-entry into the peninsula they had to contend with the Slav population between the Danube and the Balkans, and soon became firmly established in the country they have ever since inhabited. The country north of the Danube, now called Eoumania, and formed out of Wallachia and Moldavia, was often called Bulgaria by the Byzantine writers. There is, however, no reason to believe that the Bulgarians ever, in any considerable numbers, occupied it. Their extension was rather southward and westward at the expense of the Slavs, the Greeks, and other inhabitants of the empire. At the opening of the ninth century military colonies had been established along the -whole length of the Balkans on the Bulgarian frontier.
Continual struggle against the Bulgarians
During that century the empire was engaged in a continual struggle against the Bulgarians, but, while any great advance southward was prevented, they pushed across the peninsula as far as Durazzo. When they had thus won their position they had not yet become Slavicized, though Slavic names begin to appear at a very early period, and ultimately their own language was entirely forgotten. During the tenth century they were attacked on all sides, but held their own. In the eleventh century the Byzantine emperors tried something like a policy of extermination, and Basil the Bulgaroctone, or Bulgarian slayer, commenced the execution of this policy by making a broad belt of waste country across the peninsula to Durazzo. In the twelfth century we find the Bulgarians settled in isolated colonies in the neighborhood of the capital itself, just as they are to-day.
In like manner there were Slav colonies in various parts of the southern portion of the peninsula holidays bulgaria. In the neighborhood of Mount Olympus, which is now principally occupied by Wallachians, there was also a Slav people. Indeed, the peninsula was dotted over with small settlements of the races which had invaded the empire. At one time the interior of the Balkan peninsula was constantly spoken of as Slavinia. The Bulgarians, however, were a numerous and powerful people, the boundaries of whose territory, though continually shift-ing, -were always wide; and, up to the moment of the Latin conquest, were always a source of weakness to the empire.
North of the Black Sea
Another stream of people which had passed into the empire The Patching the broad tract to the north of the Black Sea naive. were the Patchinaks. Like the Huns, they, too, were of Turkish origin. They had occupied Wallachia and Moldavia, which for centuries was the battle-ground of the races coming from Asia, of those who had already arrived, and of the empire.
They had on one side of them the Huns or Magyars from whom they had conquered their territory, while on the other they were pressed by a new division of Turkish origin, namely, the Uzes. The latter came in such numbers that, in the eleventh century, the Patchinaks were defeated, and had to seek refuge in the empire. Protection was afforded them, but they were always unruly subjects. Some of them had embraced Mahometanism, while others were pagans; all were barbarian nomads.
Towards the end of the same century the Uzes swept over Moldavia and Wallachia, crossed the Danube, and devastated the country as far south as Macedonia. The imperial troops, with the aid of the Bulgarians and the newly protected Patchinaks, succeeded in driving them across the Danube. Even in this ease, however, permission was given to some of them to establish settlements in Macedonia.
As we approach 1200 we find the Patchinaks a constant source of trouble. In 1148 a division of them crossed the Danube and invaded the empire. Under the vigorous rule of Manuel they were driven back, but they returned again and again, and in 1186 and 1187 united themselves with the Bulgarians to pillage Thrace. Their hostilities were encouraged during the last years of the empire, when the dynastic struggles helped to weaken it. In 1200 they laid waste Macedonia. Their race, however, was almost run.