 Complete the following phrase:  After replacing Neville Chamberlain as the commander of the Movable Column, Nicholson left Peshawar on 14 June with his personal bodyguard of frontier horsemen, who took no pay and served the British only through a personal devotion to their commander. Nicholsons first act as commander was to disarm any native regiments in his column that he suspected may be disloyal. On 11 July, Nicholson managed to intercept a force of mutineers that had risen at Sialkot and murdered their British officers and civilians. After defeating them in battle, the mutineers retreated to an island on the Ravi River and Nicholson was forced to wait until 15 July before he could gather enough boats to launch an attack on the island. Nicholsons attack gained complete surprise and the British soon overwhelmed and routed the remaining sepoys. The column reached Delhi on 14 August, providing much needed support to the 