what made salah al din victories at the battle of Hattin?

Topic: what made salah al din victories at the battle of Hattin?

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my research question is “what made salah al din victories at the battle of Hattin? ” i will upload a source. and please use these two books as sources too. 1) a history of islamic societies ( https://books.google.ch/books?id=I3mVUEzm8xMC&printsec=frontcover&dq=a+history+of+islamic+societies&hl=en&sa=X&ved=0ahUKEwiK7vm5vc_MAhWKPiYKHZyHDaYQ6AEIKTAC#v=onepage&q=a%20history%20of%20islamic%20societies&f=false )
2)arab historians of the crusaders. (https://books.google.ch/books?id=E3-ECgAAQBAJ&printsec=frontcover&dq=battle+of+hattin&hl=en&sa=X&ved=0ahUKEwjuiuD3vs_MAhWEPBQKHWR3Ap8Q6AEIJTAB#v=onepage&q=battle%20of%20hattin&f=false)

so these are 3 sources. please i need two or three more but please make sure that they are reliable.

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