Feudalism {Ans: A political system in which nobles are granted the use of lands that legally belong to their king, in exchange for their loyalty, military service, and protection of the people who live on the land}Islam {Ans: A religion based on the teachings of the prophet Mohammed which stresses belief in one god (Allah), Paradise and Hell, and a body of law written in the Quran. Followers are called Muslims.}Baghdad {Ans: Capital of Abbasid dynasty located in Iraq near ancient Persian capital of Ctesiphon}Crusades {Ans: A series of holy wars from 1096-1270 AD undertaken by European Christians to free the Holy Land from Muslim rule.}Lay Investiture Controversy {Ans: A disagreement between Henry IV and Pope Gregory VII about who should appoint church officials.}Theocracy {Ans: A government controlled by religious leaders}