Answer:
Western Roman Empire - The Western Part of the Empire that fell to the Germanic Invasions, and whose fall gave start to the Middle Ages.
Prince Shotoku - An important Japanese noble who served during the Japanese feudal era, and who had a cult following.
Crusades - a series of holy wars between Christian Europe and Muslim Middle East for the control and rule over the Holy Land.
Yellow Turbans - a peasant rebellion in ancient China against the Han dynasty, that even if supressed, resulted in the weakening of the Han, and the beginning of a period of political instability in China.
feudal Japan - the economic and geographical organization prevalent in Japan during the Middle Ages and until the Meiji Restoration.
Jerusalem - the holiest city for Christianity and Judaism, and also one of the holy cities of Islam. For this reason, this city is of great political importance.
Thomas Aquinas - perhaps the most important philosopher of the Middle Ages, developed a systematic understand of theology and religion in his most famous work, Summa Theologica.
Constantinople - the capital of the Byzantine Empire, the sucessor of the Eastern Roman Empire. The most important, populated, and wealthiest city in Europe during all of the Middle Ages.
Saxons - a Germanic people from what is now Denmark who emigrated in large numbers to Britain and established kingdoms there.
Constantine - the Roman Emperor who established Christianity as the official religion of the Empire, and who moved the capital of the Empire from Rome to Constantinople.
Empress Wu Zetian - the only Empress in the history of China, who interrupted briefly the rule of the Tang dynasty.
Visigoths - a germanic people who emigrated to what is now Spain and Portugal, and settled there, ruling Iberia for over 100 years until the Muslim invasion.
