What is presitipation?

What was communication like in the 1400s? How many battles was George Washington in and how many did he lose? Facts about salah al din? Was the second crusade a success? Who invented the first shoe lace? What is eastern? What products were imported to Europe from Asia as a result of the Crusades? Why did Rockefeller have man at the crossroads destroyed? How did the Crusades help the Catholic Church gain power? How did Sir Galahad get the Holy Grail? Whom did Jacques Cartier meet? What is a medieval mode? What are the origins of wearing pants down off the butt? Who started the Carmen winsted story? Why did the frankish babies died in infancy? Did emperor Claudius have any children? What were the middle ages advanced cities? Who were the famous people in 1600s? Who invented the walker and why? When diocletian took power in AD 284 what did he do?