won a battle at Unnao, but casualties, disease and heatstroke reduced his force to 850 effectives, and he fell back. Havelock managed to get a spy through to the Residency, telling them that 2 rockets would be fired at a certain time on the night when the relief force was ready to attack. There followed a sharp exchange of letters between Havelock and the insolent Brigadier James Neill who was left in charge at Cawnpore. Havelock eventually received 257 reinforcements and some more guns, and tried again to advance. He won another victory near Unao on 4 August, but was once again too weak to continue the advance, and retired. Havelock intended to remain on the north bank of the Ganges, inside Oudh, and thereby prevent the large force of rebels which had been facing him from joining the siege of the Residency, but on 11 August, Neill reported that Cawnpore was threatened. To allow himself to retreat without being attacked from behind, Havelock marched again to Unao and won a third victory there. He then fell back across the Ganges, and destroyed the newly completed bridge. On 16 August, he defeated a rebel force at Bithur, disposing of the threat to Cawnpore. Havelock's retreat was tactically necessary, but caused the rebellion in Oudh to become a national revolt, as previously uncommitted landowners joined the rebels. First relief of Lucknow Havelock had been superseded in command by Major General Sir James Outram. Before Outram arrived at Cawnpore, Havelock made preparations for another relief attempt. He had earlier sent a letter to Inglis in the Residency, suggesting he cut his way out and make for Cawnpore. Inglis replied that he had too few effective troops and too many sick, wounded and non-combatants to make such an attempt. He also pleaded for urgent assistance. The rebels meanwhile continued to shell the garrison in the Residency, and also dug mines beneath the defences, which destroyed several posts. Although the garrison kept the rebels at a distance with sorties and counter-attacks, they were becoming weaker and food was running short. Outram arrived at Cawnpore with reinforcements on 15 September. He allowed Havelock to command the relief force, accompanying it nominally as a volunteer until Lucknow was reached. The force numbered 3,179 and was composed of six British and one Sikh infantry battalions, with three artillery batteries, but only 168 volunteer cavalry. They were divided