Bir Sreshtha Hamidur Rahman was born in 1945 at village Dumuria in Chapra thana of the district of 24 Parganas in West Bengal. After the partition of India at 1947 his family migrated to East Bengal and was permanently settled at Gharoda under Khalispur in Khulna district. He had his primary education at Khalispur Primary School and subsequently at a local night school.

He joined East Bengal Regiment on 2 February 1971 and was posted at EBR centre in Chittagong cantonment. On the face of the attack of Pakistan army on 25 March Hamidur Rahman left the cantonment for his village home, and then joined the liberation force at Dhalai on the south-eastern border of Sreemangal thana in Sylhet district.

For its strategic importance the freedom fighters took a bid for capturing the Dhalai border outpost of the Pak-army. The 'C' Company of the First East Bengal Regiment was entrusted with the task with which Hamidur Rahman was enrolled. On the preceding night of 28 October, 1971 three platoons of freedom fighters silently advanced towards the outpost. The platoons while approaching near to the enemy post and were on the verge of attempting a surprise, a sudden explosion of a mine alarmed the enemies who started indiscriminate firing. A battle continued for hours; but the advance of the freedom fighters was seriously obstructed by enemy firing with LMG from south-west direction.

This Light Machine Gun was to be neutralized and the onerous responsibility of doing so was reposed on Sepoy Hamidur Rahman. Instantly he crawled very close to the Light Machine Gun post undetected by the enemy. The hard ground under his chest and the volume of fire on all directions from either side could not for a moment discourage this illustrious son of the soil from fulfilling the assigned task. Not caring for life, determined Sepoy Hamidur Rahman jumped into the enemy Light Machine Gun post and engaged in hand to hand fight with the two crews and at one stage neutralized the gun at the cost of his life. Thus Dholai Border Outpost was captured. Sepoy Hamidur Rahman never knew that it was because of his supreme sacrifice that the mission was achieved.

In recognition of his valour and sacrifice in the Liberation War he was honoured with the highest state insignia of 'Bir Sreshtha'.