Understand the geopolitical situation of Christendom in the middle ages, broken down page by page with illustrations and simple explanations.  Children learn: 
​
Byzantine Schism of 1054
The pope's reason for calling the First Crusade
An overview of the Holy Land
Islamic religion and invasion
Battles and characters of the First Crusade
The Catholic Church's charitable defense of the east and pious motives of Crusaders