Torpedoes were the main weapon. The submarines also had a naval gun that they would use on unarmed ships and many had machine gun mounts as well.
submarines were used in WW1 and the weapons used were torpedos and a deck gun.
Germany must surrender its submarines and weapons
World War I submarines were primarily used to locate and attack surface cargo and warships.
mustard gas, several different types of rifles, also aiplanes and submarines
Yes, they were used to shoot shells of chemical gases into other trenches but other weapons used during World War 1 included Military Airplanes, Machine Guns, Tanks, and submarines
The major weapons were machine guns, artillery guns, poison gas, tanks, zepplins and submarines.
Germany must surrender its submarines and weapons.
Q Ships - which were merchant ships armed with camouflaged weapons which could be used against surface submarines.
They were used extensively throughout the war - from beginning to end.
They were used by submarines to navigate when not in open waters, They were also used by submarines and anti-submarine ships to locate enemy submarines.
Poison Gas (chloride and mustard): The Tank:The Aeroplane: Flame Throwers, submarines/u-boats, Lee-Enfield Rifle
During World War 2, it is reported that over 2,000 variants of Japanese Submarines were used during World War 2. Out of this, it is estimated that 10,000s were likely to be used during WW2.