The Crusades resulted in better technology and a change in attitude, prompting the desire to discover new places and the navigational equipment to allow people to do this. An increase in trade also helped to spur the Age of Exploration.
The first Crusade is a result of people listening to Pope Urban II and starting a holy war against Islam. The wars were in the Middle East and they spanned several centuries. There were a total of eight Crusades with the first lasting from 1096 to 1099 and the final one starting in 1270. The crusading era ended in 1291.