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 Badr him seeing "the camels of [Medina] laden with certain death"). This further demoralized the Quraish, as Arab battles were traditionally low-casualty affairs, and set off another round of bickering among the Quraishi leadership. However, according to Arab traditions Amr ibn Hishām quashed the remaining dissent by appealing to the Quraishi's sense of honor and demanding that they fulfill their blood vengeance. The battle began with champions from both armies emerging to engage in combat. Three of the Medinan Ansar emerged from the Muslim ranks, only to be shouted back by the Meccans, who were nervous about starting any unnecessary feuds