What was the first volley gun?
Volley gun
The Ribauldequin was a medieval version of the volley gun. It had its barrels set up in parallel. This early version was first employed during the Hundred Years' War by the army of Edward III of England, in 1339. Later on, the late Swiss army employed it.
SMS Vulcano
In July 1849 "Vulcano" took part in the first aggressive use of balloons in warfare, serving as a balloon carrier (the precursor to the aircraft carrier) in the first offensive use of air power in naval aviation. Austrian forces besieging Venice attempted to float some 200 paper hot air balloons, each carrying a 24- to 30-pound bomb that was to be dropped from the balloon with a time fuse over the besieged city. The balloons were launched mainly from land; however, some were also launched from "Vulcano". The Austrians used smaller pilot balloons to determine the correct fuse settings. At least one bomb fell in the city; however, due to the wind changing after launch, most of the balloons missed their target, and some drifted back over Austrian lines and the launching ship "Vulcano". On 4 July, she had run aground at Malamocco and come under fire from Manfrin Fort. A crew member was killed. She was damaged at her paddlebox. "Vulcan" was refloated the next day with assistance from and the Austrian steamships "Cartatone" and "Dorotea".