As the Fatimid state was at the time too weak to attempt a direct invasion, they found another means of revenge.
æz ðə fˈæɾɪmˌɪd stˈeɪt wʌz æt ðə tˈaɪm tˈuː wˈiːk tʊ ɐtˈɛmpt ɐ dᵻɹˈɛkt ɪnvˈeɪʒən, ðeɪ fˈaʊnd ɐnˈʌðɚ mˈiːnz ʌv ɹᵻvˈɛndʒ.