Isn’t it 7 soldiers firing 3 ‘rounds’ each?
3 X 7 = 21 That is the definition of a 3 shot volley. Which is why reporters so often call it a 21 gun salute. A 21 gun salute is 21 seperate "shots."
Now I don't know if the article above really was a 21 gun salute or a 3 shot volley, I was just noting the common mistake that reporters seem to make so often.
I'm sure they were performing "three volleys". A 21 gun salute is an entirely different event and is reserved for deceased Presidents and other government officials.
Three volleys goes back to the days when both sides of a battle would declare a cease-fire so the dead could be removed from the battlefield. Each side would then fire a volley of three shots to indicate they were finished and the battle could resume.
That's what I've found when researching this for my Legion Post.