One party involved in this event had been aggrieved by the diversion of the Ravi River and the lack of a single Punjabi-speaking state.
Several years after this event, a similar action was repeated with significantly fewer casualties during Operation Black Thunder. In the aftermath of this event, further anger erupted when the leader who had ordered it was said to have gained "a greater victory than the win over Bangladesh." This event was followed by an action that provoked religiously-motivated massacres at Hondh-Chillar and Pataudi. One party involved in this event had been aggrieved by the diversion of the Ravi River and the lack of a single Punjabi-speaking state. This event saw the forces of Kuldip Singh Brar kill Sant Jarnail Singh Bhindranwale, thereby dealing a severe blow to the Khalistan movement. However, in retaliation for this event, the leader who had ordered it was murdered by two bodyguards. Dealing severe damage to the Akal Takht, for 10 points, name this 1984 event ordered by Indira Gandhi, in which the Indian Army stormed a certain Sikh holy structure in Amritsar.
Several years after this event, a similar action was repeated with significantly fewer casualties during Operation Black Thunder.
Operation Blue Star (accept descriptions such as "Indira Gandhi's attack on the Golden Temple in Amritsar")