Muslim conquest of Persia Muslim conquest of Persia The Muslim conquest of Persia, also known as the Arab conquest of Iran, led to the end of the Sasanian Empire of Persia in 651 and the eventual decline of the Zoroastrian religion. The rise of Muslims coincided with an unprecedented political, social, economic, and military weakness in Persia. Once a major world power, the Sasanian Empire had exhausted its human and material resources after decades of warfare against the Byzantine Empire. The internal political situation quickly deteriorated after the execution of King Khosrow II in 628 AD. Subsequently, ten new claimants were enthroned within the
Previously Unaired Christmas insensitive by being wildly insensitive, but Glee's started to do that on an almost weekly basis now." Previously Unaired Christmas "Previously Unaired Christmas" is the eighth episode and fall finale of the fifth season of the American musical television series "Glee", and the ninety-sixth episode overall. It was directed by Wendey Stanzler and written by Ross Maxwell, and it aired on Fox in the United States on December 5, 2013. The episode is the show's fourth Christmas special, but due to season five being set in the same calendar year as season four, it is a non-canonical episode which purports