Though it is no excuse for barbarous behaviour, the sacking of Constantinople occurred in part because of a populace complacent, as was Rome in its time, and unwilling to entertain the unthinkable—that these barbarians at the gates might ever breach their defenses and that the great Queen of Cities might be vulnerable.
These Varangian body-guards, while ultimately ineffectual, were a pretty interesting retinue. Taking a lesson from history, knowing how fickle the loyalties Prรฆtorian guard could be, recruited from native sources and subject to prevailing influences, Byzantine emperors had a long-standing tradition of importing personal protectors—much like the Swiss Guard of the papacy. The Varangians were originally Viking warriors who had expanded east to the Rus—westward expansion discouraged by Englanders who were willing to keep paying the Vikings tribute (called Danegeld) not to attack them. Eventually these Scandinavians encountered the Byzantines and after some initial clashes and subsequent conversion of the Kievian-Rus to the Orthodox faith, the leaders of the Varangians pledged a division of its fiercest, professional warriors as a sign of peace. As the displacing of populations was picking up, the Vangarian stock soon expanded to attract other landless individuals to join this foreign legion. Chiefly this army began to be staffed with ranks of men of Briton extraction, themselves having migrated from Germanic lands and settled in England, who in turn were dislodged by the Norman Conquest—the Normans being Norse mercenaries themselves. Having lost hearth and home, many Britons sought their fortunes in Byzantium. I do wish, however, this Varangian vanguard had been able to rebuff the Crusaders’ advances.