This is the origin of the 21-gun salute

21-gun salute - Wikipedia

Artillery Cannon - Last Salute

Tim Kirkpatrick Archives (Page 2 Results)

Here's what communication looked like during WWII

21-gun salute - Wikipedia

PICTURES: 'A great honour' says commander after historic gun salute in York

21 Gun Salute Concert & Tour History

5 reasons why Ronald Reagan was a great commander-in-chief

The Coast Guard's Homing Pigeon saved 126 lives on D-Day