The Pakistani Army set up a military camp at Kamalpur (now in Baksiganj Upazila of Jamalpur District) which was attacked by 1st East Bengal Regiment of Z Force several times.

[7] The Pakistani troops made concrete bunkers which contained shell proof roofs.

[1] The second attack was led by Colonel (later Major General and President of Bangladesh) Ziaur Rahman on July 31, 1971.

[6][7][8] The attack was made with two companies Delta and Bravo from the North – East of the enemy camp.

However, the troops continued moving forward and entered the outer perimeter of the enemy camp.

At one stage of the fight, two artillery shells dropped in front of Captain Salauddin Mumtaz and killed him.

[8] India joined the war at late November, they sent their military formations to take Kamalpur, but it was harder for the Indian Army than expected, they made more than 3 unsuccessful attempts to take Kamalpur, the Indian Army's moral was deteriorating, and casualties were heavily increasing but they knew the Pakistani forces had no artillery, only 2 mortars left and finally on December 4, the Pakistan Army was overrun and withdrawn and fell back to their headquarters at Jamalpur after an attack by the Bangladeshi Forces and the Indian Army.