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Military Digest | ‘Sledgehammer to crack a nut’: How secret UK advice differed from India’s final plan in Operation Blue Star

Details from declassified UK files shed light on British involvement before Operation Blue Star and how the final military strategy diverged from early recommendations.

Military Digest Operation BluestarJarnail Singh Bhindranwale at the rooftop of the Sarai in Golden Temple Campus before Operation Blue Star in Amritsar. (File photo by Swadesh Talwar/The Indian Express)
7 min readChandigarhJun 7, 2026 03:43 PM IST First published on: Jun 7, 2026 at 03:12 PM IST

June 6 marked the 42nd anniversary of Operation Blue Star, the Army’s military operation to flush out militants from the Golden Temple complex in Amritsar. While the historical impact of the event is well-documented, United Kingdom government documents declassified around 12 years ago shed light on a hidden chapter: the involvement of a British military expert who warned that India’s initial strategy resembled using a “sledgehammer to crack a nut”.

The papers reveal that months before the tanks rolled into the holy shrine, a British military adviser secretly surveyed the site and proposed an entirely different tactical approach, one that was ultimately discarded when the Indian Army took complete control of the operation.

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