 Complete the following phrase:  The Mamluks experienced a continual state of political conflict, military tension, proxy wars, and economic competition between the Muslim territory Dar al-Islam and non-Muslim territory Dar al-Harb. The Battle of Ain Jalut and the glorious Battle of Marj al-Saffar 1303, the latter partly led by Imam Ibn Taymiyyah, marked the end of the 