An eagerly awaited heavy siege train joined the besieging force, and from 7 September, the siege guns battered breaches in the walls and silenced the rebels' artillery. An attempt to storm the city through the breaches and the Kashmiri Gate was launched on 14 September. The attackers gained a foothold within the city but suffered heavy casualties, including John Nicholson. The British commander (Major General Archdale Wilson) wished to withdraw, but was persuaded to hold on by his junior officers. After a week of street fighting, the British reached the Red Fort. Bahadur Shah Zafar had already fled to Humayun's tomb. The British had retaken the city.