Delhi and Allahabad) on the eve of the revolt gave sepoys some confidence.
Immediate cause
Introduction of the new Enfield Rifle (January, 1857) with greased
(supposedly with the fat of cows and pigs) cartridge, whose end had to be
bitten off before loading it into the rifle caused disaffection among the sepoys
and led to disobeyal of orders by the sepoys of the 19th Native Infantry
stationed at Berhampur on February 26, 1857, and its disbandment by the
British Government (Colonel Mitchell—its commanding officer).
    It also led to the mutiny of Mangal Pandey, a sepoy of the 34th N.1.
stationed at Barrackpur, on 29th March, 1857 (Pandey severely wounded Lt.
Baugh, Adjutant to the C.O. of Barrackpur, General Hearsey); futile attempt
to commit suicide, his execution and the disbandment of the unit. Then came
the disobey of orders by 85 men of the 3rd cavalry at Meerut, their court-
martial and imprisonment on 24th April. Refusal of the sepoys of the 7th
Awadh regiment at Lucknow to use the greased cartridges on 2nd May 1857
and its disbandment were the other important events.
                                 Mangal Pandey
Course of Revolt
Beginning
On 10th May, 1857, the Sepoys of the Third Cavalry at Meerut openly
revolted by swarming the prisons      and releasing their comrades (85 troopers