Why were the crusades a waste of time?

What nationality is Wahrenbrock? How did the pilgrimage start off? What year is MCMXiii? How did the crusades finish? Why did feudalism develop in western Europe? Which century are we in? What is a first nations medicine wheel used for? Which part of Europe remained largely agricultural and little industrialized? What drove European expansion ( 3thing)? The early development of rome was mostly influenced by the? History of Thomas Edison the light bulb? What was the situation in western europe when charlemagne took power? What European nation profited most from trade with the East in the years directley following the crusades? Fall of Rome in 500 AD and 800 AD? What was the name of fine white linen originally made in french flanders? Was the rise of slavery inevitable as the roman empire expanded? Why did it take so long to abolish the slave trade in west Africa? How did Clovis and Charlemagne contribute to spread of Christianity? What was the main purpose for the Roman roads? Why did the US devise the marshall plan which gave 13 billion in grants and loans to nations in western Europe?