Whatever praise the boldness of the Slavonians may deserve, it is sullied by the wanton and deliberate cruelty which they are accused of exercising on their prisoners. Without distinction of rank, or age, or sex, the captives were impaled or flayed alive, or suspended between four posts and beaten with clubs till they expired, or enclosed in some spacious building and left to perish in the flames with the spoil and cattle which might impede the march of these savage victors. Perhaps a more impartial narrative would reduce the number, and qualify the nature, of these horrid acts; and they might sometimes be excused by the cruel laws of retaliation. In the siege of Topirus, whose obstinate defence had enraged the Slavonians, they massacred fifteen thousand males;[25] but they spared the women and children. The most valuable captives were always reserved for labour or ransom; the servitude was not rigorous, and the terms of their deliverance were speedy and moderate. But the subject or the historian of Justinian exhaled his just indignation in the language of complaint and reproach; and Procopius has confidently affirmed that, in a reign of thirty-two years, each annual inroad of the barbarians consumed two hundred thousand of the inhabitants of the Roman Empire. The entire population of Turkish Europe, which nearly corresponds with the provinces of Justinian, would perhaps be incapable of supplying six millions of persons, the result of this incredible estimate. In the midst of these obscure calamities, Europe felt the shock of a revolution, which first revealed to the world the name and nation of the Turks.[c] TURKS AND AVARS [Sidenote: [545-557 A.D.]] Since that period the Turks have always continued to occupy a memorable place in the history of mankind, as the destroyers of ancient civilisation. In their progress towards the West, they were preceded by the Avars, a people whose arrival in Europe produced the greatest alarm, whose dominion was soon widely extended, but whose complete extermination, or amalgamation with their subjects, leaves the history of their race a problem never likely to receive a very satisfactory solution. The Avars are supposed to have been a portion of the inhabitants of a powerful Asiatic empire which figures in the annals of China as ruling a great part of the centre of Asia, and extending to the Gulf of Corea. The great empire of the Avars was overthrown by a rebellion of their Turkish subjects, and the noblest caste soon became lost to history amidst the revolutions of the Chinese Empire.