Related by context. Frequent words. (Click for all words.) 60 Genghis Khan 60 invading armies 57 Huns 55 Roman legions 54 Ottomans 54 Visigoths 52 Tsarist Russia 52 Persian Empire 52 barbarians 51 barbarian 51 Ottoman empire 51 Mesopotamian 50 British colonialists 50 Austro Hungarian empire 50 ancient Babylon 50 Babylonia 50 Roman emperors 50 Byzantines 49 Tartars 49 empires 49 imperial 49 Constantinople 49 Roman Empire 49 Assyria 49 Roman empire 48 theocracies 48 Czarist 48 Ottoman Empire 48 Mongols 48 Mughals 48 Ottoman 48 pogroms 47 fourteenth century 47 Mesopotamia 47 invaders 47 Soviet empire 47 mediaeval 47 Kublai Khan 47 imperium 47 civilization 47 Ottoman Turkish 47 Sassanid 47 thirteenth century 47 Fertile Crescent 46 Nebuchadnezzar 46 conquerors 46 fifteenth century 46 Gauls 46 Byzantine Empire 46 Golden Horde 46 medieval 45 Turkestan 45 caliphs 45 kingdoms 45 Tatars 45 Austro Hungarian 45 brutal dictators 45 tsarist 45 Soviet Communism 45 steppes 45 medieval fortress 45 #BC [002] 45 Sumerians 45 colonialists 44 Pathans 44 Communist regimes 44 marauders 44 Roman emperor 44 Khomeinist 44 Norman Conquest 44 conquest 44 protectorates 44 puppet regimes 44 #AD [002] 44 caliphate 44 Communist dictatorship 44 Tsarist 44 despot 44 Mongol 44 Cossacks 44 Hapsburg 44 Byzantium 44 imperialistic 44 pogrom 44 citadel 44 Crusades 44 Caliphate 44 Ba'athist regime 44 Persians 44 sixteenth century 44 nomadic tribes 44 Soviet Socialist Republics 44 civilizations 44 Picts 44 Bolshevik revolution 44 citadels 44 feudal 43 ancient civilization 43 Caliph 43 Eurabia 43 Abyssinia