On 16 June 1979 , the Muslim Brotherhood carried out an attack on cadets at the Aleppo Artillery School , officially killing 83 . Around this time , professor Yusef al-Yusef was assassinated in Aleppo , an event often cited by secular activist Wafa Sultan as the reason she came to oppose Islam in general . The Syrian government responded by sentencing to death about 15 prisoners , already accused of being Iraqi agents , for belonging to the Islamic resistance movement . Terrorist attacks then became a daily occurrence , particularly in Aleppo and other northern cities . The government tended to ascribe these attacks to the Brotherhood , but as the armed resistance gained widespread popular support and more loosely defined armed groups appeared , especially in poor neighborhoods , it became difficult to determine the extent of the Brotherhood 's involvement
attack
Aleppo Artillery School massacre
Muslim Brotherhood of Syria