>>18502
Really, it was impossible for them to conquer the Franks because of the circumstance they were in compared to their previous enemies. The reason why the Visigoths fell was because it was basically split in two after Roderic got into power, and rebels like the Sephardic Jews and anti-Roderic factions basically assisted the Umayyads in conquering the Visigoths, they likely wouldn't do as well against Wittiza, who far more Visigoths supported and were loyal to, aside from the Sephardic Jews really. The reason why the Byzantines fell in Syria was because they just fought a 30 year war with the Sassanians, and lost basically all of the Middle East Asia until recovering it after the 30 year war, this also applies to North Africa. When you think about it, the Byzantines only really got more powerful because of the Arab invasions, they fought enemies on literally every single front, they fought both the Ostrogoths and Visigoths, the Vandals, the Lombards, the Varangians, the Arabs, the Khazars, the Bulgars, the Slavs, the Turks, basically every Eastern European and Middle Eastern medieval power you could think of tried to take down the Byzantines at one point, and they still managed to not only repel attacks, but regain much of its former territory, for example, they reconquered Crete from the Arabs, the modern day Hatay Province in Turkey also from the Arabs, the Balkans from the Bulgars, and Crimea from the Khazars. The reason for its downfall were the Crusaders, the Mongols, and the Turks.