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
Union Army of the Shenandoah the Shenandoah Valley to produce foodstuffs for the Confederacy, torching farms and more than 2,000 mills. Reinforced again in reaction to the threat of Sheridan's 31,000-man army, Early moved against Sheridan once more. After a decisive cavalry victory by Union forces under Brig. Gen. George Armstrong Custer at the Battle of Tom's Brook, Early’s army launched a surprise attack against Sheridan at the Battle of Cedar Creek on October 19. Initially successful, the Confederates were repelled by a Union counterattack and the Valley was firmly under Union control. Following their victory, portions of the Army of the Shenandoah were detached