// The troops were driven back by a salvo [ˈsælvoʊ] of cannon fire.

// The conclusion of her performance was answered with a salvo [ˈsælvoʊ] of cheers and applause.

salvo
noun [ˈsælvoʊ]

In military contexts, salvo refers to various actions involving discharge or release of bombs, rockets, artillery, etc., as well to the bombs or projectiles released in such an action. In general use, salvo is usually used to refer to a strong or sudden verbal attack, but it can also refer to a sudden occurrence of applause, laughter, etc., from many people.

from Italian in the late 16th century... ultimate source is the Latin word salve, meaning “hail!

English