The months of December, 1857, January, February, and March, 1858, were occupied in preparing for the final advance on Lucknow and the break-up of the many bodies of mutineers scattered over Oude, Bundulcund, and the North-West Provinces. Reinforcements were daily arriving from England, but it was not until the beginning of March that Sir Colin was able to commence his advance on Lucknow. His army now numbered upwards of 20,000 men, with 180 guns. Never in the history of India had such a large number of British troops taken the field.
The Cavalry Division, under Sir Hope Grant, included the Queen's Bays, 7th Hussars, 9th Lancers, Hodson's Horse, Daly's Horse, Sam Browne's Horse, and the 25th Cavalry, in addition to the division under Outram.
The Second Division, under Sir Edward Lugard, was composed of the Third Brigade (Brigadier Guy)—34th, 38th, and 53rd Regiments; Fourth Brigade (Adrian Hope)—42nd, 93rd, and 57th Wilde's Rifles.
The Third Division, under General Walpole, comprised the Fifth Brigade (Brigadier Douglas)—23rd, 79th, and 1st Munster Fusiliers; Sixth Brigade (Horsford)—2nd and 3rd Battalions Rifle Brigade and 56th Rifles.
The artillery was under the command of Sir Archdale Wilson, who had been made a K.C.B. for the capture of Delhi.
Casualties at the Relief of Lucknow by Havelock.
| Regiments. | Officers. | Men. | ||
| K. | W. | K. | W. | |
| 5th Northumberland Fus. | 1 | 2 | 23 | 29 |
| 64th N. Staffs. | 1 | 3 | 7 | 81 |
| 78th Ross. Buffs | 2 | 6 | 47 | 85 |
| 84th York and Lancaster | 2 | 4 | 25 | 55 |
| 90th Scottish Rifles | 4 | 7 | 39 | 62 |
| 102nd R. Dublin Fusiliers | 1 | 4 | 33 | 83 |
| 14th Ferozepore Sikhs | - | 1 | 7 | 37 |
Casualties at the Relief of Lucknow by Sir Colin Campbell, November, 1857.
| Regiments. | Officers. | Men. | ||
| K. | W. | K. | W. | |
| Staff | 2 | 6 | - | - |
| Naval Brigade | 1 | 3 | 4 | 17 |
| 9th Lancers | - | - | - | - |
| Royal Artillery | 1 | 6 | 14 | 59 |
| Roy. Engineers | - | 1 | 3 | 17 |
| 5th Fusiliers | - | - | 5 | 3 |
| 8th King's | - | - | - | 1 |
| 23rd R. Welsh Fusiliers | - | 1 | 3 | 18 |
| 53rd Shropshire L.I. | - | 3 | 10 | 63 |
| 64th Regiment | - | - | 4 | 7 |
| 82nd Regiment | 1 | 1 | 1 | 13 |
| 84th Regiment | - | - | 1 | 8 |
| 90th Light Inf. | 1 | 3 | 6 | 22 |
| 93rd H'landers | 2 | 7 | 33 | 62 |
| 102nd R. Dublin Fusiliers | 1 | - | 3 | 12 |
| 21st Cavalry | - | - | 2 | 3 |
| 22nd Sam Browne's H. | - | - | 1 | 2 |
| 25th Cavalry | - | - | - | 3 |
| 56th Punjab R. | 1 | 1 | 5 | 18 |
| 57th Wilde's R. | 1 | 2 | 13 | 50 |