As Gough's army closed in on the Sikh Army, Sher Singh attempted a last outflanking move, sending cavalry to cross the Chenab, and re-cross in Gough's rear. They were thwarted by heavy rains which made the river difficult to cross, and by British irregular cavalry led by Harry Burnett Lumsden and William Hodson. On 21 February, Gough attacked the Sikh Army at the Battle of Gujrat. Here, he began the battle with a three-hour bombardment from almost 100 guns, which drove the Sikhs from their hasty entrenchments. He then sent his cavalry and horse artillery after them in a pursuit which lasted for four hours. The Sikh loss was estimated at between 3,000 and 5,000 men and 53 guns; the British casualties were 96 killed and 700 wounded.