How did the later crusades differ from the first crusades?

How might the size of the Roman Empire have affected cultural exchange among those who were ruled by the Romans? Who can a blacksmith marry in Medieval Times? What began when the Turks closed off overland trading routes? Where did the term 'best practices' originate from? How did the west respond to the blockade? Why were large medieval cities located along rivers? What is half an hour past ten fifteen? What is the monarcy? How did western ranchers and farmers get there prouduct to the eastern markets? History of eastern visayas? How many years did roman elected officials served? Who ruled the Italian peninsula before the Romans took over in 509 BC? What was the modern calendars name? How do you order a time line in chronological order from A.D to B.C? Who coined the phrase 'what the dickens'? What incident was the start of recorded history for these people in the chrysalids? During the period of the Crusades warfare between Christians and Muslims lasted nearly years? Who invented the robe? What are the mixenden crusaders? Where the gladiator games held?