Related by context. Frequent words. (Click for all words.) 64 Byzantines 62 Persian Empire 60 Assyria 59 Byzantine Empire 58 Ottomans 57 Ottoman empire 57 Mesopotamia 56 Fertile Crescent 56 Babylonia 56 Ottoman Empire 56 ancient Mesopotamia 55 Constantinople 55 Roman Empire 55 thirteenth century 54 fourteenth century 54 invading armies 54 conquest 54 Roman legions 54 ancient Babylon 53 Byzantium 53 #BC [002] 53 Ottoman 53 Mesopotamian 52 Sumerians 52 Huns 52 Persians 52 Hellenistic 52 Roman empire 52 Ottoman Turkish 52 caliphs 51 Assyrians 51 fifteenth century 51 Etruscans 51 Roman emperors 51 sixteenth century 51 Mughals 51 #AD [002] 50 Sassanid 50 Visigoths 50 Tsarist Russia 50 Babylonians 50 Middle Ages 50 Genghis Khan 50 civilizations 50 millenniums 50 antiquity 49 ancient civilization 49 Crusades 49 Czarist 49 ancient 48 Achaemenid 48 kingdoms 48 Babylonian 48 conquerors 48 Peloponnesian War 48 Parthian 48 millennia 48 Caliph 48 ancient civilizations 48 Bolshevik revolution 47 empires 47 Anglo Saxons 47 Bolshevik Revolution 47 centuries 47 Canaanite 47 #BC [003] 47 Christianized 46 Han Dynasty 46 Bronze Age 46 caliphate 46 ancient Persia 46 Phoenicians 46 Nebuchadnezzar 46 Emperor Constantine 46 Ming Dynasty #-# 46 #th century 46 civilization 46 Sumerian 46 eighteenth century 46 Turkestan 46 Tartars 45 pogroms 45 despotic rule 45 Spanish conquistadors 45 Gauls 45 Ming dynasty 45 AD# [001] 45 Romans 45 Caliphate 45 caliph 45 Picts 45 Black Plague 45 Shi'ism 45 Canaanites 45 mediaeval 45 ancient Israelites 44 Herodotus 44 Circassians 44 Crimean War 44 Islamic Caliphate 44 Napoleonic wars