In 1709, Baba Deep Singh joined
Banda Singh Bahadur during the
Battle of Sadhaura and the
Battle of Chappar Chiri. In 1733,
Nawab Kapur Singh appointed him a leader of an armed squad (
jatha). On the Vaisakhi of 1748, at the meeting of the
Sarbat Khalsa in
Amritsar, the 65
jathas of the
Dal Khalsa were reorganized into twelve
Misls. Baba Deep Singh was entrusted with the leadership of the
Shaheed Misl. With the
invasion of India by
Nadir Shah between January–May 1739 and the t
otal destruction of the Mughal administration in the Punjab as a result, the Sikhs saw an opportunity for themselves and pillaged and sought revenge on their enemies. According to the contemporary writer Harcharan Das in his ''Chahár Gulzár Shujá'í
, in 1740, one year after the attack of Nader Shah, a large force of Sikhs and Jats, including local Muslims, seized the Sirhind sarkar'' of the
Jullunder Doab, establishing a short-lived polity with a person named Daranat Shah as its head. The rebellion was eventually crushed by a Mughal force in 1741 under Azimullah Khan and the Sikhs retreated to the
Lakhi Jungle. According to
Hari Ram Gupta, Daranat Shah was Baba Deep Singh.
Demolition of the Harmandir Sahib In April 1757,
Ahmad Shah Durrani raided
Northern India for the fourth time. While he was on his way back to
Kabul from
Delhi with young men and women as captives, the
Sikhs made a plan to relieve him of the valuables and free the captives. The squad of
Baba Deep Singh was deployed near
Kurukshetra. His squad freed a large number of prisoners and raided Durrani's considerable treasury. On his arrival in
Lahore, Durrani, embittered by his loss, ordered the demolition of the
Harmandir Sahib (the "Golden Gurudwara"). The shrine was blown up and the sacred pool filled with the entrails of slaughtered animals. Durrani assigned the
Punjab region to his son,
Prince Timur Shah, and left him a force of ten thousand men under General Jahan Khan. Baba Deep Singh, 75 years old, felt that it was up to him to atone for the sin of having let the
Afghans desecrate the shrine. He emerged from scholastic retirement and declared to a congregation at Damdama Sahib that he intended to rebuild the temple. Five hundred men came forward to go with him. Baba Deep Singh offered prayers before starting for Amritsar: "May my head fall at the Darbar Sahib." As he went from hamlet to hamlet, many villagers joined him. By the time
baba Deep Singh reached
Tarn Taran Sahib, ten miles from Amritsar, over five thousand Sikhs armed with hatchets, swords, and spears accompanied him. == Death ==