I found out that today like all days in sikh history has some historical events
11th June
GURGADDI DIVAS : Sahib Guru Hargobind Sahib Jee
1985 : Harjinder Singh and Sukhdev Singh Sukha killed General Vaidya, who had led the invasion of Sri Darbar Sahib on June 4, 1984.
1984. : Sikh soldiers left their barracks at Ramgarh and began to march towards Amritsar Sahib.
1982. : Bhai Kulwant Singh Nagoke, was brutally tortured and killed in a fake encounter.
1982 : 15 Birrs of Sri Guru Granth Sahib were burned at the village of Makha.
ਸਤਿਗੁਰਬਚਨਕਮਾਵਣੇਸਚਾਏਹੁਵੀਚਾਰੁ॥