Underseaboats.
They're german submarines, used in world war 1 and world war 2
The nickname of German submarines during World War I was "U-boats," which stands for "Unterseeboot," meaning "undersea boat" in German. These submarines played a significant role in naval warfare, employing tactics such as unrestricted submarine warfare to disrupt Allied shipping. U-boats became notorious for their effectiveness in sinking merchant and military vessels. The term has since become synonymous with German submarines in both World Wars.
Destroyers, aircraft, and the convoy system.
During WW1, German U-boats (submarines) used torpedoes to sink boats and ships belonging to the Allies or any vessel aiding the Allies war cause.
Britain, France, Germany, Italy and USA all used submarines during WW1
The Allies, including Great Britain, USA, Russia and Italy all had submarines during WW1. In general they were not nearly as advanced or successful as the German U-boats.
machine guns tanks poison gas submarines airplanes
They were the submarines of the German Navy. U-boat is short for undertseeboote (undersea boat).
Submarines.
Britain, USA, Germany and Italy used submarines during WW1
yes
Submarines fought in both WW1 and WW2.