Baba Harbhajan Singh joined the Punjab regiment. He was killed in 1968 near the Nathu La in eastern Sikkim, India. Harbhajan Singh's early death at the age of 22 is the subject of legend and religious veneration that has become popular folklore among Indian Army regulars ("jawaans"), the people of his village and apparently soldiers of the Chinese People's Liberation Army (PLA) across the border guarding the Indo-Chinese border between Sikkim and Tibet. The official version of his death is that he was a victim of battle at the Nathu La, a mountain pass between Tibet and Sikkim where many battles took place
Harbhajan Singh in further controversy after an 2008 Indian Premier League (IPL) match between Mumbai Indians and Kings XI Punjab at Mohali in April 2008. While the teams were shaking hands, he slapped Punjab paceman and Indian teammate Sreesanth in the face. Harbhajan, who had stood in as the Mumbai captain for the first three matches of the tournament to that point, all of which were lost, had apparently been angered by Sreesanth's aggressive sending-off of his batsmen as Punjab coasted to a decisive victory. The Kings XI Punjab lodged an official complaint to the IPL. The match referee Farokh Engineer found