English: Military map of the city of Lucknow, capital of the state of Oudh, and its surroundings. At the outbreak of the Great Mutiny in May 1857, 1,700 English and Indian troops fortified the British Residency in Lucknow, 270 miles southeast of Dehli. They took refuge here as a mutineer force approached on 1st July. The garrison under Sir Henry Havelock held out against 60,000 rebels. On 25th September a force of 3,000 men of the British army, commanded by Sir Havelock and Sir James Outram, fought their way into the residency from Cawnpore. Sir Havelock died from exhaustion before a second relief force led by Sir Colin Campbell arrived on 19th November. Campbell reinforced the garrison before moving southwest to smother a new uprising in Cawnpore. General Outram held the residency for four months until it was liberated by Campbell on March 21, 1858. Relief is shown by hachures.