simultaneous firing from several guns, mortars, rocket launchers, carbines, and so on.
It is done at a set signal or command. In a combat situation the volley is used to inflict a sudden and powerful fire strike on the enemy. Volleys of fire are also used for salutes and paying military respects. Terms such as “division volley,” “ship volley,” and others are sometimes used to designate all the fire capabilities of all the unit’s artillery or rifle weapons fired simultaneously.