What is disertivication?

How did the peace of westphalia lay the foundations? Could a Roman soldier resign? What were the three long term effects of the enlightenment that helped shape western civilization? What alliance is mande up of the US and Western European Countries? How is time calculated in history? Where did the cattle industry (ranching) in Texas begin? What does the name willam mean? Where does the word butt originate? What is the origin of the name Dawn? Who decides what is important enough to be history? What is the Edict of Sophia? What invention played recorded music? Why did they have crusades? What group of people invented the wheel? What is the feminine of Walter? How the Romans were not afraid from their neighbors and their and the people they conquered? What might have happened in Europe if the crusades had never taken place? What is the alpine mountain system? What was the difference between a knight and a vassal? What was the one religion the Romans considered a problem?