(علاقة الأيوبيين بالزنكيين (566-631/1171-1233

This study cover an important period in the history of Muslims, this is the era of Zankees who defeated the crusade attacks and the crusade armies whom attacked the Muslim countries during this period. The study also shows the good relationships between Zankees and the Ayubians during this critical period. It seems clear that there was an important development during this critical era, the development of economy, army, administrations and many other type of promotions in various fields in Egypt which is ruled by Salahaddin. This development was planned by Imadudin Zanky, whom was very intelligent that could change the doctrine of the people from Shia Al Ubaidy to be Sunna Doctrine. The study includes an introduction with three chapters, the introduction presented the important of this elements which lead to the huge development in this critical period. The first chapter presents the good relationship between Zankees and Ayubians during this period. This chapter has two sections, section one deals with the role of Ayubians during the era of Zankees and the second section how they defeated the crusades. Chapter two has three sections, the main title of the chapter is the relationship between Zankees and the Ayubians, the first section deals with the relationship of the Zankees and Ayubians in Egypt, while second chapter deals with the relationship of Zankees and Ayubians in Aleppo in Syria. The third section deals with factors and reasons of Nuradddin Victory against the Crusade campaigns in all the wars and the method fighting. This section has three main points; the first point is about the internal policy of Nuraddin Zanky in the administration systems, the second is about the disputes and misunderstanding between Salahaddin and Nuradin Zanky. The third is on the some matters and occurrences during the last part of the Nuradin's ruling regime, then he died. The conclusion and the resources list is attached at the end of the thesis.