The fascinating story behind the military's use of the 21-gun

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Why do 21 gun salutes have 7 soldiers firing three rounds each, and not 21 soldiers firing once? - Quora

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Honor Guard Performs 21-Gun Salute and TAPS

The Social History of the Machine Gun: Ellis, John: 9780801833588: : Books

Does the President and Vice President receive a 21 gun salute as a matter of courtesy? - Quora

Hey there. Why did Biden not get a 21 gun salute? - Quora

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Where do all the 21 bullets land in during the Republic Day parade? - Quora

21-gun salute - Wikipedia

21-gun salute - Wikipedia

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