Baba Gurbaksh Singh , Who served under the Shaheedan Misl, was born in 1688 to Chaudhran Lachmi Devi and Chaudhary Dasaunda Singhba Bhullar Jat Zamindar of Leel in Patti Pargana in the Majha Region, now days this village is on the Indo-Pak Punjab border in modern day Kasur District.
Baba Gurbaksh Singh in childhood with his parents went to Anandpur Sahib in the presence of Guru Gobind Singh and father took Khande de Pahul becoming Sardar Dasaunda Singh. Baba Gurbaksh Singh stayed at Anandpur listened to teachings of Sikh Faith from Guru Gobind Singh.
Baba Gurbaksh Singh was always dressed in blue baanaa and kept a very strong Rehit (discipline). He would awake at Amrit-vela (early hours before sunrise) and do ishnaan (bathe). Then, while reciting Gurbaani, Baba Gurbaksh Singh would tie his tall dastaar. Baba Gurbaksh Singh loved Sarbloh (pure iron) and would adorn his body and dastaar with iron Shastars (weapons) and armour. Every Amrit-vela Baba jee sat in the divaan at Siree Akaal Takhat Sahib. Rich or poor, he greeted all people with the same respect. He had absolutely no worldly aspirations or greed. Whenever there was a battle, Baba jee would be in the forefront carrying the the Nishaan Sahib (Sikh flag) and advancing to the forward to the beat of the nagaara (war drum).
During the days of Sikh Guerilla warfare or days in which Mughal governors of Lahore put a price on heads of the Sikhs, Baba Gurbakash Singh like other Sikhs of his time fought against the Mughal forces. Brave Jatsikhs of Majha had spilt their blood made sacrifices yet they continued to fight bravely.
Ahmad Shah Abdali arrived in Punjab and reached Eminabad. It was at Eminabad that Ahmad Shah was Joined by his Baloch ally Nasir Khan. Ahmad Shah Abdali commanded a force numbering 18,000 while Nasir Khan commanded a force numbering 12,000.The Afghan and Baloch forces marched towards Lahore in which where they got into a Skirmish with the Sikhs under the command of Bhatti Jat ruler Sardar Charat Singh Of Sukerchakia. Ahmad Shah heard news that the Sikhs had retreated towards Amritsar. Ahmad Shah arrived in Amritsar on December 1, 1764 however the Afghan forces did not come across any large gathering of Sikhs. Baba Gurbaksh Singh, Nihal Singh, Basant Singh, Man Singh along with 26 other Sikhs had stayed in Amritsar to fight a last stand against the Afghan and Baloch forces.
In 1764 the Afghans were soon attacked by 30 Sikhs lead by Baba Gurbaksh Singh at Shri Harmandir Sahib. It was in this skirmish that Baba Gurbaksh Singh along with the 29 Sikh defenders were killed. Later The remains of Baba Gurbaksh Singh along with the other dead sikhs were cremated and a memorial called Shaheedganj was built to commemorate the fallen Sikhs.