These caliphs were not the successors of the Byzantine emperors or of the Sassanian king of kings.

哈里发不是拜占庭皇帝的继承人，也不是萨珊王朝万王之王的继承人。

So when we last left the Muslims, they had expanded out of their homeland in Arabia and conquered the rich Egyptian provinces of the Byzantines and the entire Sassanian empire, all in the space of about 100 years.

因此，当我们最后一次离开穆斯林时，他们已经从他们在阿拉伯的家园扩张， 并征服了拜占庭和整个萨珊帝国的富裕埃及省份， 这一切都发生在大约 100 年的时间里。

To learn more about the Persian  empire, then check out our book, The Persian Empire: A Captivating Guide to the  History of Persia, Starting from the Ancient Achaemenid, Parthian, and Sassanian Empires  to the Safavid, Afsharid, and Qajar Dynasties.

要了解有关波斯帝国的更多信息， 请查看我们的书，波斯帝国：波斯历史的迷人指南，从古代阿契美尼德帝国、帕提亚帝国和萨珊帝国到萨法维王朝、阿夫沙尔王朝和卡扎尔王朝。