 A further Ilkhanid invasion in 1303 was repelled after the Ilkhanid defeat at the Battle of Marj al-Suffar in the plains south of Damascus.Baybars II ruled for roughly one year before an-Nasir Muhammad became sultan again in 1310, this time ruling for over three consecutive decades in a period that is often considered by historians of the Mamluk period to be the apex of both the Bahri regime specifically and the Mamluk Sultanate in general.To avoid the experiences of his previous two reigns where the mamluks of Qalawun and Khalil held sway and periodically assumed the sultanate, an-Nasir Muhammad launched efforts to establish a centralized autocracy.