Battle of the Trench enemy in the open (which led to victory at Badr), and waiting for them inside the city (a lesson learnt from the defeat at Uhud) were both suggested. Ultimately, the outnumbered Muslims opted to engage in a defensive battle by digging deep trenches to act as a barrier along the northern front. The tactic of a defensive trench was introduced by Salman the Persian. Every capable Muslim in Medina including Muhammad contributed to digging the massive trench in six days. The ditch was dug on the northern side only, as the rest of Medina was surrounded by rocky mountains and
Battle of Al-Sannabra Frankish land magnates, who ultimately depended upon rents from cultivators of the soil. Mawdud was unable to make any permanent conquests after his victory. Soon afterward, he was assassinated and Aq-Sunqur Bursuqi took command of the failed attempt against Edessa in 1114. Roger of Salerno routed the last Seljuk invading army at the Battle of Sarmin after a protracted campaign in 1115. Battle of Al-Sannabra In the Battle of Al-Sannabra (1113), a Crusader army led by King Baldwin I of Jerusalem was defeated by a Muslim army sent by the Sultan of the Seljuk Turks and commanded by Mawdud ibn