A sports stadium in Shahjahanpur and a crude oil tanker were named after Singh. Singh was born on 21 November 1916 in Khajuri village of Shahjahanpur, Uttar Pradesh. He was the son of Birbal Singh Rathore, a farmer, and Jamuna Kanwar. He was the third of eight children, with six brothers and a sister. Though Singh studied up to fourth year standard in a local school in his village, he could not continue his education further due to his family's economic situation. He spent most of his childhood helping out his family with agricultural work around the farm. For recreation, he wrestled and eventually became the wrestling champion of his village. For his character and well-being, he was nicknamed ""Hanuman Bhagat Bal Brahmachari"". This was after Hanuman, a Hindu god who was unmarried for life. Singh never married. During the Second World War, Singh enlisted in the 7th Rajput Regiment of the British Indian Army, on 21 November 1941 at Fatehgarh Regimental Centre. On completing his training, Singh was posted to the regiment's 1st Battalion. During late 1942, the battalion was deployed to the Arakan Province during the Burma campaign, where they fought against the Japanese. The battalion was part of the 47th Indian Infantry Brigade, assigned to the 14th Indian Infantry Division. It fought actions around the Mayu Range in late 1942 and early 1943, advancing up the Mayu Peninsula towards Donbaik as part of an operation to recapture Akyab Island. Although the Rajputs were held up around the cluster of villages called Kondan in December 1942, the advance slowly continued towards Donbaik. It was there, where the brigade's attack ground to a halt and they were subsequently relieved by the 55th Indian Infantry Brigade in early February 1943. In early April, the Japanese counterattacked. The 47th Brigade became cut off around Indan and eventually split off into small groups to fight their way back to Allied lines. The surviving members of the brigade returned to India. In 1945, Singh's battalion was assigned to the 2nd Indian Infantry Brigade and took over the defence of the Andaman and Nicobar Islands. The islands had been partially occupied by the Japanese forces, which surrendered on 7 October 1945. After returning to India, Singh was promoted to the rank of Naik (corporal). After the partition, the 7th Rajput Regiment was assigned to the Indian Army. Singh remained with the newly raised Indian regiment, continuing to serve in its 1st Battalion.