Its expert military and diplomatic power ensured inadvertently that Western Europe remained safe from many of the more devastating invasions from eastern peoples, at a time when the still new and fragile Western Christian kingdoms might have had difficulty containing it.
Dets miliære og diplomatiske magtapparat sikrede Vesteuropa fra mange af de mere ødelæggende invasioner fra øst i en tid, hvor de kristne kongedømmer i vest sandsynligvis ikke ville have formået at forsvare sig.