Who was Salah al-Din Ayyubi? How did he become the champion of the wars against crusaders? What was his origin? Why and how did he destroy the Fatimid government?

Who was Salah al-Din Ayyubi? How did he become the champion of the wars against crusaders? What was his origin? Why and how did he destroy the Fatimid government? .. Concise answer Salah al-Din Yusuf bin Ayyub who later became known as Salah al-Din Ayyubi, better known in the Western world as Saladin, is one of the most famous Muslim rulers and commanders in the Islamic middle centuries (or in the 12th century of the English calendar