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The alliance initiated the Grand War in 738, after the Umayyad Caliphate resumed massive attacks on the Byzantine Empire, in which the entire Christian and Muslim worlds were engulfed in war with one another for years. Following an Islamic "victory" in the Grand War, the Holy Alliance was dissolved and replaced with the Holy League, formed among the remaining Christian states in central and northern Europe to reconquer eastern Europe from the Umayyads and the Emirate of Narbonne and Parisian Kingdom.