The Strategic Setting • A Bi-Polar World • Two Major Powers – Sassanian Persia – Byzantine Empire – World War for Ten Years
Mean Rainfall Determines All
The Hydraulic Theory • Too little water • Unevenly delivered in space and time. • Drought drives waves of immigration. • Such a drought drove Islamic expansion.
Muhammad
Allah
The Shahada
Early Expansion
Early Stability • Equilibrium quickly reached. • Christian pilgrimages permitted • Holy Land in the hands of Egyptian Fatimids in 11 th Century.
Seljuk Turks Ended That • Battle of Manzikert in 1071 • Byzantine Defeat • Catastrophe for Christendom • Emperor appealed to pope for help in spite of schism.
Seljuq Turk Invasion
Onset of the Turks Manzikert 1071
Seljuqs
Emperor Alexis Comnenus
Urban II Preaching the Crusade
Clermont
An Armed Pilgrimage
Muhammad’s Trip to Paradise
Crusader Routes
Alexius Comnenus
Anna Comnena
Godfrey, Bohemund and Tancred
Raymond of Toulouse
Christ Leading the Crusaders
Dorylaeum
The Siege of Jerusalem 1099
Jerusalem Besieged 1099
Godfrey and his men at the Stone of Anointment
May God Forgive Me
Duke Godfrey of Bouillon “Advocate of the Holy Sepulchre”